Control of Emotion and Wakefulness by Neurotensinergic Neurons in the Parabrachial Nucleus / 神经科学通报·英文版

The parabrachial nucleus (PBN) integrates interoceptive and exteroceptive information to control various behavioral and physiological processes including breathing, emotion, and sleep/wake regulation through the neural circuits that connect to the forebrain and the brainstem. However, the precise identity and function of distinct PBN subpopulations are still largely unknown. Here, we leveraged molecular characterization, retrograde tracing, optogenetics, chemogenetics, and electrocortical recording approaches to identify a small subpopulation of neurotensin-expressing neurons in the PBN that largely project to the emotional control regions in the forebrain, rather than the medulla. Their activation induces freezing and anxiety-like behaviors, which in turn result in tachypnea. In addition, optogenetic and chemogenetic manipulations of these neurons revealed their function in promoting wakefulness and maintaining sleep architecture. We propose that these neurons comprise a PBN subpopulation with specific gene expression, connectivity, and function, which play essential roles in behavioral and physiological regulation.

Craneotomía despierta para tumores cerebrales / Awake craniotomy for brain tumors

Resection of tumoral lesions anatomically related to motor, sensitive and language areas of the brain, have the main goal of sparing those areas. For that purpose, Neurosurgery on awake patients helps in reducing the size of growing brain tumors in a safe manner, which leads to extending and improving quality of life. Therefore, the greatest benefit lies in maximizing tumor ex- traction while minimizing neurological injury. In this article, we review current evidence of the application of awake craniotomy, and we describe the anesthetic management that we perform during this type of procedures.

La resección de lesiones tumorales relacionadas anatómicamente con las áreas motoras, sensitivas y especialmente las del lenguaje, tiene como objetivo principal la preservación de éstas. Para ello la neurocirugía con el paciente despierto puede ayudar a reducir de manera segura el tamaño de tumores cerebrales en crecimiento, lo que suele prolongar y mejorar la calidad de vida, verificando en tiempo real el resultado del acto quirúrgico. El mayor beneficio radica entonces en maximizar la extracción tumoral minimizando el daño neurológico. En este artículo revisamos la evidencia actual de la aplicación de la craneotomía en el paciente despierto y describimos el manejo anestésico que realizamos durante este procedimiento.

A new biofeedback approach for the control of awake bruxism and chronic migraine headache: utilization of an awake posterior interocclusal device / Uma nova abordagem via biofeedback para o controle do bruxismo de vigília e de enxaqueca crônica: utilização de um dispositivo interoclusal posterior em vigília

ABSTRACT Background: The relationship of bidirectional comorbidity between chronic migraine and pain in the cephalic segment led us to evaluate the improvement in reducing the pain in patients diagnosed with chronic migraine headache and awake bruxism, when undergoing treatment with a partial posterior interocclusal device designed for the management and control of awake bruxism through biofeedback. Methods: Seventy-four patients were evaluated during the following periods: pretreatment, seven, thirty, ninety, one hundred and eighty days, and one year. The evaluation was carried out by measuring the pain in the pretreatment period and pain reduction after awake bruxism treatment, using clinical evaluation and numerical scales for pain. Results: Most of the patients who complained of headache migraine pain, masticatory myofascial pain, temporomandibular joint and neck pain experienced a significant reduction in overall pain, including headaches, between t0 and t30 (p<0.0001). After 30 days of using the device, it was observed that the improvement remained at the same level without any recurrence of pain up to t90. At t180 and t360, it was observed that even with the device withdrawal (at t90) the improvement remained at the same level. Conclusion: The utilization of a posterior interocclusal device designed for the management and control of awake bruxism through biofeedback seems to contribute to the reduction of pain (including migraine headache) in the majority of patients, and, even with the device withdrawal (at t90), the improvement remained at the same level, suggesting the patients succeeded in controlling their awake bruxism and consequently the pains.

RESUMO Introdução: A relação de comorbidade bidirecional entre enxaqueca crônica e dor no segmento cefálico nos levou a avaliar a melhora na redução da dor em pacientes diagnosticados com cefaleia crônica de enxaqueca e bruxismo de vigília, quando submetidos a tratamento com dispositivo interoclusal posterior parcial projetado para o manejo e o controle do bruxismo acordado através de biorretroalimentação (biofeedback). Métodos: Setenta e quatro pacientes foram avaliados durante os seguintes períodos: pré-tratamento, sete, trinta, noventa e cento e oitenta dias, e um ano. A avaliação foi realizada por meio da avaliação da dor no período pré-tratamento e redução da dor após o tratamento do bruxismo de vigília, através de avaliação clínica e escalas numéricas de dor. Resultados: A maioria dos pacientes que se queixou de dor de cabeça com enxaqueca, dor miofascial mastigatória, articulação temporomandibular e dor no pescoço sofreu uma redução significativa na dor geral, incluindo dores de cabeça, entre t0 e t30 (p<0,0001). Após 30 dias de uso do dispositivo, observou-se que a melhora permaneceu no mesmo nível, sem recorrência da dor até t90. Em t180 e t360, observou-se que, mesmo com a retirada do dispositivo (em t90), a melhoria permaneceu no mesmo nível. Conclusão: A utilização de um dispositivo interoclusal posterior projetado para o controle do bruxismo de vigília através de biofeedback parece contribuir para a redução da dor (incluindo enxaqueca) na maioria dos pacientes, e, mesmo com a retirada do dispositivo (t90), a melhora manteve-se no mesmo nível, sugerindo que os pacientes conseguiram controlar o seu bruxismo de vigília e a dor associada a esse hábito.

Sueño en los niños: fisiología y actualizacion de los últimos conocimientos / Sleep in children: physiology and update of a literature review

El sueño es un proceso fisiológico activo y cíclico que tiene efectos críticos en la salud. Sus funciones son numerosas: crecimiento, desarrollo, aprendizaje, memoria, eficiencia sináptica, regulación del comportamiento, emoción, fortalecimiento inmunológico y tiempo de limpieza de sustancias neurotóxicas. Durante los primeros años de vida hay una serie de cambios importantes en el desarrollo que conducen al patrón esperado de sueño y vigilia en los adultos. El sueño ocupa un tercio de la vida del adulto. Sin embargo, dormir durante los primeros meses de vida ocupa más del 50% del tiempo. Esta revisión del tema describirá los patrones normales de sueño en la infancia.

Sleep is an active and cyclic physiological process that has a critical impact on health. Its functions are numerous: growth, development, learning, memory, synaptic efficiency, regulation of behavior, emotion, immune strengthening and cleaning time of neurotoxic substances. During the first years of life, there are a number of important changes in development, which lead to the expected pattern of sleep and wakefulness in adults. The sleep occupies a third of the adult's life. However, sleeping during the first months of life takes up more than 50% of time. This review of the topic will describe normal sleep patterns in childhood.

State-dependent changes in the upper airway assessed by multidetector CT in healthy individuals and during obstructive events in patients with sleep apnea / Alterações nas vias aéreas superiores avaliadas por TC multidetectores durante a vigília e o sono em indivíduos saudáveis e em pacientes com apneia do sono durante eventos obstrutivos

ABSTRACT Objective: To determine whether airway narrowing during obstructive events occurs predominantly at the retropalatal level and results from dynamic changes in the lateral pharyngeal walls and in tongue position. Methods: We evaluated 11 patients with severe obstructive sleep apnea (OSA) and 7 healthy controls without OSA during wakefulness and during natural sleep (documented by full polysomnography). Using fast multidetector CT, we obtained images of the upper airway in the waking and sleep states. Results: Upper airway narrowing during sleep was significantly greater at the retropalatal level than at the retroglossal level in the OSA group (p < 0.001) and in the control group (p < 0.05). The retropalatal airway volume was smaller in the OSA group than in the control group during wakefulness (p < 0.05) and decreased significantly from wakefulness to sleep only among the OSA group subjects. Retropalatal pharyngeal narrowing was attributed to reductions in the anteroposterior diameter (p = 0.001) and lateral diameter (p = 0.006), which correlated with an increase in lateral pharyngeal wall volume (p = 0.001) and posterior displacement of the tongue (p = 0.001), respectively. Retroglossal pharyngeal narrowing during sleep did not occur in the OSA group subjects. Conclusions: In patients with OSA, upper airway narrowing during sleep occurs predominantly at the retropalatal level, affecting the anteroposterior and lateral dimensions, being associated with lateral pharyngeal wall enlargement and posterior tongue displacement.

Resumo Objetivo: Determinar se o estreitamento das vias aéreas durante eventos obstrutivos ocorre predominantemente na região retropalatal e resulta de alterações dinâmicas nas paredes laterais da faringe e na posição da língua. Métodos: Avaliamos 11 pacientes com apneia obstrutiva do sono (AOS) grave (grupo AOS) e 7 indivíduos saudáveis sem AOS (grupo controle) durante a vigília e o sono natural (documentado por meio de polissonografia completa). Por meio de TC multidetectores rápida, obtivemos imagens das vias aéreas superiores no estado de vigília e de sono. Resultados: O estreitamento das vias aéreas superiores durante o sono foi significativamente maior na região retropalatal do que na região retrolingual no grupo AOS (p < 0,001) e no grupo controle (p < 0,05). O volume da via aérea retropalatal foi menor no grupo AOS do que no grupo controle durante a vigília (p < 0,05) e diminuiu significativamente da vigília ao sono apenas no grupo AOS. O estreitamento retropalatal da faringe foi atribuído à redução do diâmetro anteroposterior (p = 0,001) e lateral (p = 0,006), que se correlacionou com o aumento do volume das paredes laterais da faringe (p = 0,001) e o deslocamento posterior da língua (p = 0,001). Não ocorreu estreitamento retrolingual da faringe durante o sono no grupo AOS. Conclusões: Em pacientes com AOS, o estreitamento das vias aéreas superiores durante o sono ocorre predominantemente na região retropalatal e afeta as dimensões anteroposterior e lateral, além de estar relacionado com aumento das paredes laterais da faringe e deslocamento posterior da língua.

Videotoracoscopía con anestesia peridural en paciente despierto / Epidural anesthesia for videoassisted thoracic surgery in awake patient

Video-assisted thoracic surgery (VATS) is traditionally performed under general anesthesia and endotracheal intubation with a double lumen tube. In recent years, a growing trend towards these procedures being performed under loco regional anesthesia, particularly under epidural block with or without sedation in patients in spontaneous ventilation has appeared. It can be used to perform procedures that include pneumothorax management, wedge resection, lobectomy and surgical reduction of lung volume. The most attractive reason is to eliminate the side effects related to general anesthesia looking for a lower perioperative risks and shorter hospital stays, especially in elderly patients and those with compromised respiratory function. The thoracic epidural anesthesia has been effective allowing an adequate surgical approach, guaranteeing an idoneus level of analgesia, an optimal oxygenation, and facilitating an early postoperative recovery. We present a case of a patient undergoing to lung biopsy performed by VATS patient under epidural block and Ramsay scale sedation level III in spontaneous ventilation, who was discharged 48 hours after the surgical procedure.

La cirugía torácica asistida por vídeo se realiza tradicionalmente bajo anestesia general e intubación endotraqueal con tubo de doble luz. En los últimos años ha existido una corriente creciente hacia la realización de estos procedimientos en pacientes bajo anestesia locorregional, particularmente con bloqueo epidural con o sin sedación y en ventilación espontánea, para procedimientos que incluyen manejo de neumotórax, resección en cuña, lobectomía y cirugía de reducción de volumen pulmonar. La razón más atractiva es evitar los efectos secundarios relacionados con la anestesia general en búsqueda de menor riesgo perioperatorio y menor estancia hospitalaria, especialmente en pacientes mayores y en aquellos con función respiratoria comprometida. La anestesia epidural torácico (AET) ha sido efectiva para permitir un adecuado abordaje quirúrgico, garantizando un idóneo nivel de anestesia, una correcta oxigenación y facilitando la recuperación posoperatoria precoz]. Se presenta el caso clínico de una biopsia pulmonar realizada mediante toracoscopia en un paciente bajo AET con sedación escala Ramsay III y en ventilación espontánea, quien fue dado de alta a las 48 horas posterior a la cirugía.

Back to the liquid environment: effects of aquatic physiotherapy intervention performed on preterm infants / De volta ao meio líquido: efeitos da intervenção de fisioterapia aquática realizada em prematuros

Abstract At birth, preterm newborns (PTNB) often require Neonatal-ICU hospitalization, which, despite being a care setting, also causes stress such as pain, sleep disturbances and wakefulness, and alterations of physiological parameters. The aim of this study was to analyze the effects of aquatic physiotherapy on pain, sleep disturbances and wakefulness, and physiological variables of PTNB in Neonatal-ICU. Pain, sleep disturbances and wakefulness, and alterations of physiological parameters were evaluated at three moments: 5 minutes before intervention, immediately after and 10 minutes after intervention. At intervention, participants were wrapped in soft fabric and immersed at shoulder level in warm water (36 ° C to 37.5 ° C). Sideways, forward, backward and rotational movements were performed. Twenty-two newborns participated in the study. The results obtained in relation to pain, sleep state and wakefulness showed significant improvements in reevaluations after intervention. Physiological variables also underwent significant changes and remained within normality parameters. The results indicate that aquatic physiotherapy is effective in reducing pain, improving sleep and wakefulness and physiological variables of PTNB in Neonatal-ICU.

Resumo Ao nascer, o recém-nascido pré-termo (RNPT) frequentemente necessita internamento em UTI-Neonatal que, apesar de ser um ambiente de cuidados, também causa estresses ao RNPT como a dor, alterações de sono e vigília e de parâmetros fisiológicos. Objetivou-se analisar os efeitos da fisioterapia aquática sobre a dor, o estado de sono e vigília e variáveis fisiológicas de RNPT internados em UTI Neonatal. Avaliações sobre dor, estado de sono e vigília e das variáveis fisiológicas foram realizadas em três momentos: 5 minutos antes da intervenção, imediatamente após e 10 minutos após. Na intervenção, os participantes foram envoltos em tecidos macios e imersos, a nível do ombro, em água aquecida (36°C a 37,5°C). Foram realizados movimentos látero-laterais, ântero-posteriores e rotacionais. Participaram 22 RNPT. Os resultados obtidos em relação à dor e ao estado de sono e vigília mostram melhoras significativas nas reavaliações após a intervenção. As variáveis fisiológicas também sofreram mudanças significativas e mantiveram-se dentro dos parâmetros de normalidade. Esta pesquisa aponta que a fisioterapia aquática é efetiva na redução da dor, melhora do estado de sono e vigília e das variáveis fisiológicas de RNPT internados em UTI-Neonatal.

Modelo in vitro para el estudio del papel de la unión mesopontina en la generación del sueño de movimientos oculares rápidos y la vigilia / In vitro model for the study of the role of the mesopontine region in rapid eye movement (REM) sleep and wakefulness / Modelo in vitro para o estudo do papel da união mesopontina na geração de sono de movimentos oculares rápidos e da vigília

El estudio de las estrategias neurales para la organización del comportamiento en vertebrados constituye un desafío mayor para la Neurociencia. El avance del conocimiento en este campo depende de manera crítica de la utilización de modelos experimentales adecuados que admitan múltiples niveles de análisis (p.ej: comportamental, circuital, celular, sináptico, molecular) y abordajes multitécnicos. Nos propusimos analizar in vitro una red neural de la unión mesopontina del tronco encefálico críticamente implicada en el control del sueño de movimientos oculares rápidos (S-REM). Pese al cúmulo de evidencias que apoyan el papel desempeñado por esta red en relación al S-REM, los mecanismos celulares y sinápticos que subyacen a este control son poco conocidos y continúan siendo objeto de intensa investigación. Para avanzar en el conocimiento de estos mecanismos, se llevó a cabo la caracterización morfológica y funcional de una rodaja de tronco encefálico de la rata, en la que las estructuras críticas para el control del S-REM, i.e.: núcleos tegmentales laterodorsal y pedúnculopontino, y su proyección al núcleo reticular pontis oralis (PnO), están presentes y son operativas. La inclusión del núcleo motor del trigémino en la rodaja permitió detectar cambios de la excitabilidad de las motoneuronas ante manipulaciones farmacológicas del PnO, representativos de los cambios del tono muscular asociados a maniobras similares realizadas in vivo. La utilización de este modelo in vitro de S-REM, permitirá aportar a la dilucidación de las estrategias neurales que operan en niveles intermedios de organización del SN en mamíferos para la generación y regulación de un estado comportamental.

The study of the neural basis of behavior is a major challenge in Neuroscience. Advancing our knowledge in this field depends, critically, on the use of experimental paradigms that provide multiple levels of analysis, as well as powerful techniques. We have selected, as a model of a neural plan that organizes a complex behavior, a neural network located in the mesopontine junction. This region is thought to be both necessary and sufficient for the generation of rapid eye movement (REM) sleep, although the cellular and synaptic mechanisms involved in the control of this behavioral state at the mesopontine level are still under debate and remain poorly understood. As part of a long term effort to gain insight into these mechanisms, we carried out the morphological and functional characterization of a slice preparation of rat brainstem and we demonstrate that critical structures for the control of REM sleep - the laterodorsal and pedunculopontine tegmental nuclei and their projection to the oral part of the pontine reticular nucleus (PnO) - are present and are operational. The presence of the trigeminal motor nucleus in the slice sought to include in the experimental model a structure capable of expressing changes of the excitability of the motorneurons caused by pharmacological manipulations of the PnO, representative of changes of muscle tone associated with similar maneuvers performed in vivo. The use of this in vitro model of REM sleep will provide critical information to elucidate neural strategies that operate at intermediate levels of central nervous system organization in mammals to control behavioral states.

O estudo de estratégias neurais para a organização do comportamento em vertebrados constitui um desafio maior para a Neurociencia. O avanço do conhecimento nessa área depende criticamente da utilização de modelos experimentais adequados que suportem múltiplos níveis de análise (por exemplo: comportamental, circuital, celular, sináptico e molecular) e abordagens por múltiplas técnicas. Decidiu-se analisar in vitro uma rede neural da união mesopontina do tronco encefálico criticamente envolvida no controle do sono de movimentos oculares rápidos (S-REM). Apesar da riqueza de provas que sustentam o papel desta rede em relação ao S-REM, os mecanismos celulares e sinápticos subjacentes a este controle são pouco conhecidos e permanecem sob intensa investigação. Para avançar no conhecimento desses mecanismos, caracterizou-se morfológica e funcionalmente uma fatia de tronco encefálico de rato, na qual as estruturas críticas para o controle do S-REM, i.e.: núcleos tegmentais laterodorsal e pedunculopontino, e sua projeção para o núcleo reticular pontis oralis (PnO) estão presentes e operantes. A inclusão do núcleo motor do trigêmeo na fatia permitiu detectar mudanças da excitabilidade das motoneuronas provocadas por manipulações farmacológicas do PnO, representativas das alterações do tônus muscular associados com operações semelhantes quando realizados in vivo. A utlização deste modelo in vitro de S-REM permitirá contribuir para a elucidação de estratégias neurais que operam em níveis intermedios de organização do SN de mamíferos para a geração e regulação de um estado comportamental.

Do que morrem os pacientes com tuberculose: causas múltiplas de morte de uma coorte de casos notificados e uma proposta de investigação de causas presumíveis / What are the causes of death of patients with tuberculosis: multiple causes of death in a cohort of cases and a research proposal of presumed causes / Cuáles son las causas de muerte de pacientes con tuberculosis: múltiples causas en una cohorte de casos notificados y una propuesta de investigación

O objetivo deste trabalho foi analisar as causas múltiplas de morte de uma coorte de pacientes notificados com tuberculose (TB) e apresentar uma proposta de investigação de causas presumíveis. Realizou-se linkage probabilístico entre o Sistema de Informação de Agravos de Notificação (SINAN) 2006 e o Sistema de Informação sobre Mortalidade (SIM), 2006-2008. Ocorreram 825 mortes, das quais 23% por TB, 16% com TB e 61% sem menção da TB. Duzentos e quinze (42,7%) óbitos ocorreram antes do término do esquema básico de tratamento e não tinham menção da TB, cujo perfil foi distinto do padrão quando a TB era uma das causas associadas. A elevada frequência de doenças do aparelho respiratório, AIDS e causas mal definidas sugerem falha na qualidade da informação. Elaborou-se proposta de correção das causas associadas no SIM e de investigação de óbito com base na relação de causas presumíveis. De acordo com a proposta, 26 óbitos poderiam ter a causa básica modificada. Este estudo destaca a gravidade do quadro da TB e a importância do linkage para a vigilância da TB e melhoria das informações do SIM e do SINAN.

The objective of this study was to analyze the multiple causes of death in a cohort of patients with tuberculosis (TB) and to introduce an investigation proposal death for TB from a list of presumable causes. We performed a probabilistic record linkage with the databases of the Information System for Notifiable Diseases (SINAN) 2006 and the Mortality Information System (SIM) 2006-2008. There were 825 deaths, of which 23% for death for TB, deaths due to TB with 16% and 61% without mention of TB. Two hundred and fifteen (42.7%) deaths occurred within the period of treatment, whose profile differed from the pattern of causes when TB was an associated cause, with high frequency of respiratory diseases, AIDS and ill-defined causes. We elaborated a proposal for correction of associated causes of death and an investigation proposal death for TB from a list of presumable causes. According to the proposal, 26 deaths could have modified the underlying cause. This study highlights the importance of record linkage to TB surveillance and improvement of information the SIM and SINAN.

El objetivo fue analizar las múltiples causas de muerte en una cohorte de pacientes con tuberculosis (TB) y presentar una propuesta de investigación de las causas presumibles. Hicieron linkage probabilística entre el Sistema de Información de Enfermedades de Declaración Obligatoria (SINAN) 2006 y el Sistema de Información sobre Mortalidad (SIM) 2006-2008. 825 muertes, de las cuales 23% para TB, 16% con TB y 61% sin mención de TB. Doscientos quince (42,7%) muertes ocurrieron antes del final de el tratamiento primario y tenía ninguna mención de TB, cuyo perfil era distinto del patrón observado cuando la TB era una causa asociada. La alta frecuencia de enfermedades respiratorias, SIDA y causas mal definidas sugieren insuficiencia en la calidad de la información. Hemos preparado propuestas de corrección de la causa asociada en el SIM y de investigación de muerte basado en las causas presumibles. De acuerdo con la propuesta, 26 muertes podrían haber modificado la causa subyacente. Destacase la gravedad de la TB y la importancia de el linkage para la vigilancia y la mejora de la información en el SIM y SINAN-TB.

Short-duration judgment in young Indian subjects under 30 h constant wakefulness.

The present study aimed to investigate probability of a possible endogenous circadian rhythm in human cognitive attribute to estimate short intervals. Apparently healthy young males and females were selected for our study. Eight subjects prospectively produced the short-time intervals 10 s and 60 s at 2 hourly intervals in 30 h constant routine (CR) study conducted in spring (CR-1). The study was repeated again in autumn (CR-2) in the remaining eight subjects. The established circadian markers, namely serum cortisol, salivary melatonin levels and tympanic temperature were also measured either in CR-1 or CR-2. Oral temperature was measured simultaneously. Circadian rhythms were validated in serum cortisol, salivary melatonin, oral, and tympanic temperatures. Circadian rhythm in 60 s estimates was observed in a few subjects and in all males at group level in CR-1. The cognitive attribute to perceive short intervals vary as function of season. The results provide evidence in support of interaction among the interval, circadian and circannual timing systems in human.

Sleep pattern and learning in knockdown mice with reduced cholinergic neurotransmission

Impaired cholinergic neurotransmission can affect memory formation and influence sleep-wake cycles (SWC). In the present study, we describe the SWC in mice with a deficient vesicular acetylcholine transporter (VAChT) system, previously characterized as presenting reduced acetylcholine release and cognitive and behavioral dysfunctions. Continuous, chronic ECoG and EMG recordings were used to evaluate the SWC pattern during light and dark phases in VAChT knockdown heterozygous (VAChT-KDHET, n=7) and wild-type (WT, n=7) mice. SWC were evaluated for sleep efficiency, total amount and mean duration of slow-wave, intermediate and paradoxical sleep, as well as the number of awakenings from sleep. After recording SWC, contextual fear-conditioning tests were used as an acetylcholine-dependent learning paradigm. The results showed that sleep efficiency in VAChT-KDHET animals was similar to that of WT mice, but that the SWC was more fragmented. Fragmentation was characterized by an increase in the number of awakenings, mainly during intermediate sleep. VAChT-KDHET animals performed poorly in the contextual fear-conditioning paradigm (mean freezing time: 34.4±3.1 and 44.5±3.3 s for WT and VAChT-KDHET animals, respectively), which was followed by a 45% reduction in the number of paradoxical sleep episodes after the training session. Taken together, the results show that reduced cholinergic transmission led to sleep fragmentation and learning impairment. We discuss the results on the basis of cholinergic plasticity and its relevance to sleep homeostasis. We suggest that VAChT-KDHET mice could be a useful model to test cholinergic drugs used to treat sleep dysfunction in neurodegenerative disorders.

Comparativo da classificação de Fujita no paciente acordado e sob sonoendoscopia / A comparison of the Fujita classification of awake and drug-induced sleep endoscopy patients

São poucos os estudos que comparam resultados endoscópicos no paciente acordado com o mesmo paciente sob sono induzido por drogas. OBJETIVOS: O objetivo do presente estudo é comparar os acha dos endoscópicos num mesmo paciente, em dois momentos diferentes: ambulatorial e sob sedação com propofol, por meio da classificação de Fujita. Desenho do estudo: estudo de coorte transversal. MÉTODO: Trinta e quatro pacientes foram submetido ao exame otorrinolaringológico ambulatorial, incluindo nasoendoscopia com manobra de Müller com o paciente acordado e à sonoendoscopia com propofol. A classificação de Fujita foi adotada para comparar os dois exames endoscópicos. Correlacionamos a concordância entre os exames com dados clínicos dos pacientes, como Índice de Massa Corporal, idade e gravidade da síndrome da apneia obstrutiva do sono. RESULTADOS: Não houve concordância nenhuma entre os dois exames endoscópicos, seja para o grupo no geral, seja para cada um dos subgrupos analisados. CONCLUSÃO: Não existe concordância entre os achados endoscópicos com o paciente acordado e os mesmos com o paciente com sono induzido.

Only a few studies have compared the outcomes of patients kept awake during endoscopic examination and subjects submitted to drug-induced sleep endoscopy. OBJECTIVE: This study aimed to compare the endoscopic findings of patients submitted to outpatient endoscopy and endoscopic examination with sedation by propofol based on the Fujita Classification. METHOD: This cross-sectional cohort study enrolled 34 patients. The subjects underwent ENT examination, nasal endoscopy with Müller's maneuver, and drug-induced sleep endoscopy with propofol. The Fujita Classification was used to compare the two modes of endoscopic examination. The examinations were correlated to patient clinical data such as BMI, age, and OSAS severity. RESULTS: There was no agreement between the two modes of endoscopic examination, whether for the group in general or for the analyzed subgroups. CONCLUSION: There was no agreement between the endoscopic findings of endoscopic examinations done with the patient awake or in drug-induced sleep.

Increased coherence among striatal regions in the theta range during attentive wakefulness

The striatum, the largest component of the basal ganglia, is usually subdivided into associative, motor and limbic components. However, the electrophysiological interactions between these three subsystems during behavior remain largely unknown. We hypothesized that the striatum might be particularly active during exploratory behavior, which is presumably associated with increased attention. We investigated the modulation of local field potentials (LFPs) in the striatum during attentive wakefulness in freely moving rats. To this end, we implanted microelectrodes into different parts of the striatum of Wistar rats, as well as into the motor, associative and limbic cortices. We then used electromyograms to identify motor activity and analyzed the instantaneous frequency, power spectra and partial directed coherence during exploratory behavior. We observed fine modulation in the theta frequency range of striatal LFPs in 92.5 ± 2.5% of all epochs of exploratory behavior. Concomitantly, the theta power spectrum increased in all striatal channels (P < 0.001), and coherence analysis revealed strong connectivity (coefficients >0.7) between the primary motor cortex and the rostral part of the caudatoputamen nucleus, as well as among all striatal channels (P < 0.001). Conclusively, we observed a pattern of strong theta band activation in the entire striatum during attentive wakefulness, as well as a strong coherence between the motor cortex and the entire striatum. We suggest that this activation reflects the integration of motor, cognitive and limbic systems during attentive wakefulness.

Mecanismos neuronales en el control del dormir / Neural mechanisms in the control of sleep

Neural mechanisms involved in sleep and wakefulness generation are widely distributed in the central nervous system. Current models emphasize the pivotal role of the hypothalamus incontrolling the activation and inhibition of the ascending activating system and thlamo-cortical networks during wakefulness and restorative sleep respectively. The restorative properties of sleep, the duration and the timing of sleep occurrence is determined by at least two families of processes; (i) circadian rhythms generated at the hypothalamic pacemaker, that favorssleep and wakefulness at determined phases of the day; and (ii) homeostatic mechanisms that maintain the adequate daily sleep quotas, by compensating sleep debts and excesses. It is a current focus of clinical and basic research the effect of transient or chronic disruption of sleep architecture on performance and wellbeing.

A negative expiratory pressure test during wakefulness for evaluating the risk of obstructive sleep apnea in patients referred for sleep studies

OBJECTIVE: Obstructive sleep apnea is characterized by increased upper airway collapsibility during sleep. The present study investigated the use of the negative expiratory pressure test as a method to rule out obstructive sleep apnea. METHODS: Flow limitation was evaluated in 155 subjects. All subjects underwent a diurnal negative expiratory pressure test and a nocturnal sleep study. The severity of sleep apnea was determined based on the apneahypopnea index. Flow limitation was assessed by computing the exhaled volume at 0.2, 0.5, and 1.0 s (V0.2, V0.5, and V1.0, respectively) during the application of a negative expiratory pressure and expressed as a percentage of the previous exhaled volume. Receiver-operating characteristic curves were constructed to identify the optimal threshold volume at 0.2, 0.5, and 1.0 s for obstructive sleep apnea detection. RESULTS: Mean expiratory volumes at 0.2 and 0.5 s were statistically higher (p <0.01) in healthy subjects than in all obstructive sleep apneic groups. Increasing disease severity was associated with lower expiratory volumes. The V0.2 ( percent) predictive parameters for the detection of sleep apnea were sensitivity (81.1 percent), specificity (93.1 percent), PPV (98.1 percent), and NPV (52.9 percent). Sensitivity and NPV were 96.9 percent and 93.2 percent, respectively, for moderate-to-severe obstructive sleep apnea, and both were 100 percent for severe obstructive sleep apnea. CONCLUSION: Flow limitation measurement by V 0.2 ( percent) during wakefulness may be a very reliable method to identify obstructive sleep apnea when the test is positive and could reliably exclude moderate and severe obstructive sleep apnea when the test is negative. The negative expiratory pressure test appears to be a useful screening test for suspected obstructive sleep apnea.

Efeitos da fisioterapia aquática na dor e no estado de sono e vigília de recém-nascidos pré-termo estáveis internados em unidade de terapia intensiva neonatal / Effect of aquatic physical therapy on pain and state of sleep and wakefulness among stable preterm newborns in neonatal intensive care units

OBJETIVOS: Avaliar os efeitos da fisioterapia aquática na dor e no ciclo de sono e vigília de bebês prematuros estáveis hospitalizados. MÉTODOS: A pesquisa caracterizou-se como ensaio clínico não controlado de séries temporais. Foram incluídos 12 recém-nascidos clinicamente estáveis com idade gestacional inferior a 36 semanas internados em unidade de terapia intensiva neonatal. Após serem selecionados, os recém-nascidos foram colocados no meio líquido, onde foi iniciada a fisioterapia aquática, com duração de 10 minutos, na qual foram realizados movimentos que estimulam as posturas flexoras e a organização postural. Foram avaliados os ciclos sono e vigília por meio da escala de avaliação do ciclo de sono e vigília adaptada de Brazelton (1973)*, a presença de sinais de dor por meio da escala Sistema de Codificação da Atividade Facial Neonatal (NFCS), além de parâmetros fisiológicos. RESULTADOS: Em relação aos estados de sono e vigília, antes da fisioterapia, os recém-nascidos apresentaram comportamentos que variaram entre totalmente acordados, com movimentos corporais vigorosos e choro. Após a fisioterapia, os estados de sono variaram entre sono leve com olhos fechados e algum movimento corporal. Esses valores apresentaram diferenças estatisticamente significativas (p<0,001). O escore da escala de avaliação de dor também diminuiu de 5,38±0,91 para 0,25±0,46 com p<0,001 após a intervenção. Os sinais vitais mantiveram-se estáveis. CONCLUSÕES: Sugere-se que a fisioterapia aquática pode ser um método simples e efetivo na redução da dor e na melhora da qualidade do sono de bebês prematuros em UTI Neonatal. Tornam-se necessários estudos controlados e com maior número de indivíduos para a generalização dos resultados.

OBJECTIVES: To evaluate the effects of aquatic physical therapy on pain and on the cycle of sleep and wakefulness among stable hospitalized premature infants. METHODS: This study was characterized as an uncontrolled clinical trial on a time series and included 12 clinically stable newborns of gestational age less than 36 weeks who were hospitalized in a neonatal intensive care unit (NICU). After selection, the newborns were placed in a liquid medium for aquatic physical therapy lasting 10 minutes. Movements to stimulate flexor posture and postural organization were performed. The sleep-wakefulness cycle was assessed using the adapted Brazelton (1973)* scale and pain was assessed by the occurrence of signs of pain according to the Neonatal Facial Coding System (NFCS) scale; and physiological parameters. RESULTS: In relation to states of sleep and wakefulness, before the physical therapy, the newborns' behavior varied from fully awake with vigorous body movements to crying. After the physical therapy, the states of sleep ranged from light sleep with closed eyes to some body movement. These values presented statistically significant differences (p<0.001). The score on the pain assessment scale also decreased from 5.38±0.91 to 0.25±0.46, with p<0.001 after the intervention. The vital signs remained stable. CONCLUSIONS: It is suggested that aquatic physical therapy can be a simple and effective method for reducing pain and improving sleep quality among preterm infants in NICUs. Controlled studies with larger numbers of subjects are needed in order to generalize the results.

Correlations between subjective and objective features of nocturnal sleep and excessive diurnal sleepiness in patients with narcolepsy / Correlação entre as características objetivas e subjetivas do sono noturno e a hipersonolência diurna em pacientes narcolepticos

OBJECTIVE: To determine the correlations between excessive daytime sleepiness (EDS), assessed by the Epworth sleepiness scale (ESS), and the multiple sleep latency test (MSLT) and nocturnal sleep architecture features, clinical symptoms of narcolepsy (CSN) and subjective sleep quality (SSQ) in patients with narcolepsy. METHOD: Twenty three untreated patients were studied and compared with a matched control group. Diagnosis of narcolepsy was carried out employing a clinical interview, a polysomnographic (PSG) record, and an MSLT. RESULTS: Subjective number of awakenings was the SSQ indicator that best correlated with EDS (ESS and MSLT). Regarding clinical features, diurnal tiredness and sleep paralysis correlated with ESS values. Increase in ESS was related with decrease in total sleep time, SWS, and sleep onset latency. On the other hand, increase in MSLT was related with decrease in SWS. CONCLUSION: These data suggest that EDS in patients with narcolepsy could be impaired by disturbed nocturnal sleep.

OBJETIVO: Determinar as correlações entre hipersonolência, avaliada pela escala de sonolência Epworth (ESE) e o teste múltiplo de latência do sono (TMLS) com a arquitetura do sono (AS), sintomas e qualidade subjetiva do sono em pacientes narcolepticos. MÉTODO: Comparou-se um grupo de vinte e tres pacientes narcolepticos sem tratamento com grupo controle. O diagnóstico de narcolepsia foi realizado por uma entrevista clinica, polissonografia e o TMLS. RESULTADOS: O número subjetivo de despertares foi o indicador com maior relação com a hipersonolência, o cansaço diurno e a paralisia do sono também foi correlacionados com a ESE.O aumento do índice na ESE foi correlacionado com uma diminuição do tempo total do sono, no sono de ondas lentas (SOL) e com a latência para o início do sono. O incremento na TMLS foi relacionado com diminuição do SOL. CONCLUSÃO: Os dados sugerem que a hipersonolência diurna em pacientes portadores de narcolepsia pode se correlacionar com as alterações da arquitetura do sono noturno.

Assessing sleep-wake complaints in school-aged children: portuguese properties and norms of the SWEL / Avaliação dos problemas de sono-vigília em crianças em idade escolar: normas e propriedades para a população Portuguesa do SWEL

The present paper aims to analyze psychometric features of the Portuguese Sleep Wake Experience List (SWEL), to obtain norms and data about key sleep complaints for children. This questionnaire evaluates chronic sleep problems categorizing them into six categories of sleep complaints. A total of 900 elementary school students (2nd to 4th grade), 485 girls (53.9 percent) and 415 boys (46.1 percent), aged between 7 and 10 years (M = 8.63; SD = .82) were included in this study. The results indicated a good reliability and validity of the questionnaire, making him suitable as a screening tool for epidemiological purposes. The study shows that sleep complaints (14.7 percent) are a frequent syndrome in school-aged children, and often not reported to the parents and/or physician. In conclusion, the results revealed that the SWEL is a reliable and valid screening instrument for identifying potential sleep problems in Portuguese school-aged children population.

Este estudo pretende analisar as propriedades psicométricas da versão portuguesa do Questionário de Experiências de Sono-Vigília (SWEL) e a obtenção de normas e dados relativos às queixas de sono-chave nas crianças. Este questionário avalia os problemas de sono crônicos, classificando-os em seis categorias de queixas relativamente ao sono. Foram avaliadas 900 crianças do 1º CEB (2º-4º ano), 485 delas são meninas (53,9 por cento) e 415 meninos (46,1 por cento), com idades entre os 7-10 anos (M= 8,63; DP= 0,82). Verificou-se uma boa fidelidade e validade do questionário, tornando-o uma ferramenta adequada para estudos de carácter epidemiológico. O estudo mostra que as queixas relativas ao sono (14,7 por cento) são síndromes freqüentes em crianças que 1º CEB que na maioria das vezes não são referidas pelos pais e/ou médicos. Assim, o SWEL é um instrumento de detecção válido e fiável para a identificação de potenciais problemas de sono nas crianças em idade escolar.

Awake intubation with Airtraq laryngoscope in a morbidly obese patient.

The Airtraq laryngoscope (AL) is a new disposable tracheal intubation device. The authors reported the case of a successful awake intubation with AL of the trachea in a morbidly obese patient. A 54-year-old female, morbidly obese (BMI 38 kg/m), patient was scheduled for a tumor removal of the right eye under general anesthesia. She had symptoms of gastroesophageal reflux. The preoperative airway assessment showed difficult ventilation and intubation. An awake intubation under sedation and topical airway anesthesia were chosen. The first attempt of tracheal intubation with AL was unsuccessful because the tip of endotracheal tube (ET-tube) pointed to the arytenoid cartilage. The second attempt, with slight rotation of AL, glottic view showed grade I and the ET-tube passed through the vocal cords easily The authors 'experiences demonstrated that the AL could be used while awake and may be an alternative laryngoscope for airway management in morbidly obese patients.

The medial septum acts through the medial preoptic area for thermoregulation and works with it for sleep regulation.

The chronic changes in sleep-wakefulness (S-W), body temperature (Tb), locomotor activity (LMA) and thermal preference were studied in male Wistar rats after the destruction of neurons in both the medial preoptic area (mPOA) and the medial septum (MS) by intracerebral injection of N-methyl-D-aspartic acid. An increase in the Tb, and a preference for higher ambient temperature (Tamb) of 30 degrees C were observed after the combined lesion of the mPOA and the MS. Similar changes were reported to occur after the lesion that was restricted to the mPOA. But these alterations were in contrast to the decrease in Tb and preference for lower Tamb, observed after the MS lesion. The thermostat of the brain would have been reset at a higher level after the combined lesion, as there was an increase in Tb, along with a preference for a higher Tamb, and an increase in LMA. There was a reduction in the frequency and the duration of the slow wave sleep (SWS) episodes, and a reduction in the frequency of the paradoxical sleep (PS) episodes after the combined lesion. The destruction of the MS neurons was probably responsible for the reduction in the frequency of SWS, whereas the loss of mPOA neurons was responsible for the decrease in the duration of SWS and frequency of PS. It can be suggested that the MS exerts its influence on thermoregulation through the mPOA. However, the MS and the mPOA seem to play independent, but complementary roles in sleep promotion.