Interactive Atlas of the Canine Brain, Heart and Kidney Created from Plastinated Samples

SUMMARY: Currently, training in the field of anatomy requires the implementation of learning and knowledge technologies (TAC). Therefore, the objective of this work was to use digital images taken of plastinated canine brains, hearts, and kidneys to create an interactive atlas that facilitates the teaching-learning of the anatomy of these organs. The research was carried out in 3 phases. In the first, canine brains, hearts and kidneys were obtained using the cold-temperature silicone plastination. In the second stage, photographs were taken, the images were edited with Adobe Photoshop and converted to SVG format using Adobe Illustrator. During the last phase, the 2D atlas was created using MongoDB and Node.js for the backend and Vue.js as the framework for the frontend. In addition, it was used three.js to render the 3D models. As a result, the 'Interactive Canine Atlas', ATINCA, was created. The atlas comprises 27 interactive images and 27 in atlas mode view (28 of the brain, 20 of the heart, and 6 of the kidney). Furthermore, the atlas features 3D models of the three organs. The developed atlas constitutes the first digital tool created in Ecuador based on local institutional needs, including a 3D format. Consequently, ATINCA will be integrated into the curricula as a digital material that will facilitate significant autonomous and collaborative learning of canine anatomical knowledge.

Actualmente, la formación en el campo de la anatomía requiere la implementación de tecnologías del aprendizaje y el conocimiento (TAC). Por ello, el objetivo del trabajo fue utilizar imágenes digitales tomadas de cerebros, corazones y riñones caninos plastinados para crear un atlas interactivo que facilite la enseñanza-aprendizaje de la anatomía de estos órganos. La investigación se llevó a cabo en tres fases. En la primera se obtuvieron cerebros, corazones y riñones caninos mediante la técnica de plastinación con silicona al frío. En la segunda etapa se tomaron fotografías, las imágenes se editaron con Adobe Photoshop y se convirtieron a formato SVG con Adobe Illustrator. Durante la última fase, se creó el atlas 2D usando MongoDB y Node.js para el backend y Vue.js como framework para el frontend. Además, se utilizó three.js para renderizar los modelos 3D. Como resultado se creó el Atlas Interactivo del Canino, ATINCA. El atlas cuenta con 27 imágenes interactivas y 27 en vista modo atlas (28 del cerebro, 20 del corazón y 6 del riñón). Además, el atlas presenta modelos 3D de los tres órganos. El atlas desarrollado constituye la primera herramienta digital creada en el Ecuador con base en necesidades institucionales locales y donde se incluye el formato 3D. Con lo cual, ATINCA podrá incorporarse en las mallas curriculares como material digital que facilitará el aprendizaje autónomo y colaborativo significativo de conocimientos anatómicos de los órganos caninos.

Encephalopathy in hospitalized patients with Coronavirus disease 2019: A single-center study

Objective@#This study aimed to determine the incidence of encephalopathy among hospitalized patients with COVID-19. @*Methods@#This was a retrospective observational study conducted in a tertiary hospital in Cebu City, Philippines. This study is a complete enumeration of all records of adult patients admitted for COVID-19 detected through polymerase chain reaction from March 1, 2020 to September 30, 2021. The cases were then classified as to the presence or absence of encephalopathy. @*Results@#The study determined that 6 in every 1000 admitted COVID-19 patients developed encephalopathy. The clinico-demographic profile of patients with encephalopathy were mostly elderly with a mean age of 67, males (55.7%), and obese stage I (61.1%). Encephalopathy was more likely to develop in patients with type 2 diabetes mellitus (80.1%) and coronary artery disease (40.0%). Most patients who did not have encephalopathy however had a history of CVD. Most patients (66.7%) who developed encephalopathy were dyspneic on presentation. Laboratory examination results showed an increase in fasting blood sugar and elevated levels of LDH, CRP, serum ferritin, procalcitonin, and D-dimer. Majority of patients (66.7%) with encephalopathy were intubated. Taking into consideration the stage of infection and the incidence of encephalopathy, most patients (66.6%) were in the hyperinflammatory stage. The number of hospitalization days and severity of illness did not have any association with developing encephalopathy. Dichotomous categorization of outcomes into deceased and discharged showed that clinical outcomes and the development of encephalopathy were significantly associated, with 66.7% of patients with encephalopathy expiring during their course of hospitalization.@*Conclusion@#The incidence of encephalopathy among admitted COVID-19 patients was 6 in every 1000 patients. Encephalopathy was more common in elderly males who were obese with type 2 diabetes mellitus and coronary artery disease. The most common presentation of patients who developed encephalopathy was dyspnea. Collated laboratory results showed an increase in fasting blood sugar and elevated levels of LDH, CRP, serum ferritin, procalcitonin, and D-dimer. Majority of patients with encephalopathy were intubated and were in the hyperinflammatory stage of COVID-19 infection. Dichotomous categorization of outcomes into deceased and discharged showed that clinical outcomes and the development of encephalopathy were significantly associated, with most patients with encephalopathy expiring during their course of hospitalization.

Research progress on brain functional near-infrared spectroscopy technology in the field of neonates / 中国当代儿科杂志

Functional near infrared spectroscopy (fNIRS) is an emerging neuroimaging tool that reflects the activity and function of brain neurons by monitoring changes in brain oxygen metabolism based on the neurovascular coupling mechanism. It is non-invasive and convenient, especially suitable for monitoring neonatal brain function. This article provides a comprehensive review of research related to the developmental patterns of brain networks concerning language, music, and emotions in neonates using fNIRS. It also covers brain network imaging in neonatal care, resting-state brain network connectivity patterns, and characteristics of brain functional imaging in disease states of neonates using fNIRS.

Distributions of Visual Receptive Fields from Retinotopic to Craniotopic Coordinates in the Lateral Intraparietal Area and Frontal Eye Fields of the Macaque / 神经科学通报·英文版

Even though retinal images of objects change their locations following each eye movement, we perceive a stable and continuous world. One possible mechanism by which the brain achieves such visual stability is to construct a craniotopic coordinate by integrating retinal and extraretinal information. There have been several proposals on how this may be done, including eye-position modulation (gain fields) of retinotopic receptive fields (RFs) and craniotopic RFs. In the present study, we investigated coordinate systems used by RFs in the lateral intraparietal (LIP) cortex and frontal eye fields (FEF) and compared the two areas. We mapped the two-dimensional RFs of neurons in detail under two eye fixations and analyzed how the RF of a given neuron changes with eye position to determine its coordinate representation. The same recording and analysis procedures were applied to the two brain areas. We found that, in both areas, RFs were distributed from retinotopic to craniotopic representations. There was no significant difference between the distributions in the LIP and FEF. Only a small fraction of neurons was fully craniotopic, whereas most neurons were between the retinotopic and craniotopic representations. The distributions were strongly biased toward the retinotopic side but with significant craniotopic shifts. These results suggest that there is only weak evidence for craniotopic RFs in the LIP and FEF, and that transformation from retinotopic to craniotopic coordinates in these areas must rely on other factors such as gain fields.

Temporal Unfolding of Racial Ingroup Bias in Neural Responses to Perceived Dynamic Pain in Others / 神经科学通报·英文版

In this study, we investigated how empathic neural responses unfold over time in different empathy networks when viewing same-race and other-race individuals in dynamic painful conditions. We recorded magnetoencephalography signals from Chinese adults when viewing video clips showing a dynamic painful (or non-painful) stimulation to Asian and White models' faces to trigger painful (or neutral) expressions. We found that perceived dynamic pain in Asian models modulated neural activities in the visual cortex at 100 ms-200 ms, in the orbitofrontal and subgenual anterior cingulate cortices at 150 ms-200 ms, in the anterior cingulate cortex around 250 ms-350 ms, and in the temporoparietal junction and middle temporal gyrus around 600 ms after video onset. Perceived dynamic pain in White models modulated activities in the visual, anterior cingulate, and primary sensory cortices after 500 ms. Our findings unraveled earlier dynamic activities in multiple neural circuits in response to same-race (vs other-race) individuals in dynamic painful situations.

Reshaping the Cortical Connectivity Gradient by Long-Term Cognitive Training During Development / 神经科学通报·英文版

The organization of the brain follows a topological hierarchy that changes dynamically during development. However, it remains unknown whether and how cognitive training administered over multiple years during development can modify this hierarchical topology. By measuring the brain and behavior of school children who had carried out abacus-based mental calculation (AMC) training for five years (starting from 7 years to 12 years old) in pre-training and post-training, we revealed the reshaping effect of long-term AMC intervention during development on the brain hierarchical topology. We observed the development-induced emergence of the default network, AMC training-promoted shifting, and regional changes in cortical gradients. Moreover, the training-induced gradient changes were located in visual and somatomotor areas in association with the visuospatial/motor-imagery strategy. We found that gradient-based features can predict the math ability within groups. Our findings provide novel insights into the dynamic nature of network recruitment impacted by long-term cognitive training during development.

Single-Cell Mapping of Brain Myeloid Cell Subsets Reveals Key Transcriptomic Changes Favoring Neuroplasticity after Ischemic Stroke / 神经科学通报·英文版

Interactions between brain-resident and peripheral infiltrated immune cells are thought to contribute to neuroplasticity after cerebral ischemia. However, conventional bulk sequencing makes it challenging to depict this complex immune network. Using single-cell RNA sequencing, we mapped compositional and transcriptional features of peri-infarct immune cells. Microglia were the predominant cell type in the peri-infarct region, displaying a more diverse activation pattern than the typical pro- and anti-inflammatory state, with axon tract-associated microglia (ATMs) being associated with neuronal regeneration. Trajectory inference suggested that infiltrated monocyte-derived macrophages (MDMs) exhibited a gradual fate trajectory transition to activated MDMs. Inter-cellular crosstalk between MDMs and microglia orchestrated anti-inflammatory and repair-promoting microglia phenotypes and promoted post-stroke neurogenesis, with SOX2 and related Akt/CREB signaling as the underlying mechanisms. This description of the brain's immune landscape and its relationship with neurogenesis provides new insight into promoting neural repair by regulating neuroinflammatory responses.

Temporal-spatial Generation of Astrocytes in the Developing Diencephalon / 神经科学通报·英文版

Astrocytes are the largest glial population in the mammalian brain. However, we have a minimal understanding of astrocyte development, especially fate specification in different regions of the brain. Through lineage tracing of the progenitors of the third ventricle (3V) wall via in-utero electroporation in the embryonic mouse brain, we show the fate specification and migration pattern of astrocytes derived from radial glia along the 3V wall. Unexpectedly, radial glia located in different regions along the 3V wall of the diencephalon produce distinct cell types: radial glia in the upper region produce astrocytes and those in the lower region produce neurons in the diencephalon. With genetic fate mapping analysis, we reveal that the first population of astrocytes appears along the zona incerta in the diencephalon. Astrogenesis occurs at an early time point in the dorsal region relative to that in the ventral region of the developing diencephalon. With transcriptomic analysis of the region-specific 3V wall and lateral ventricle (LV) wall, we identified cohorts of differentially-expressed genes in the dorsal 3V wall compared to the ventral 3V wall and LV wall that may regulate astrogenesis in the dorsal diencephalon. Together, these results demonstrate that the generation of astrocytes shows a spatiotemporal pattern in the developing mouse diencephalon.

Multisensory Conflict Impairs Cortico-Muscular Network Connectivity and Postural Stability: Insights from Partial Directed Coherence Analysis / 神经科学通报·英文版

Sensory conflict impacts postural control, yet its effect on cortico-muscular interaction remains underexplored. We aimed to investigate sensory conflict's influence on the cortico-muscular network and postural stability. We used a rotating platform and virtual reality to present subjects with congruent and incongruent sensory input, recorded EEG (electroencephalogram) and EMG (electromyogram) data, and constructed a directed connectivity network. The results suggest that, compared to sensory congruence, during sensory conflict: (1) connectivity among the sensorimotor, visual, and posterior parietal cortex generally decreases, (2) cortical control over the muscles is weakened, (3) feedback from muscles to the cortex is strengthened, and (4) the range of body sway increases and its complexity decreases. These results underline the intricate effects of sensory conflict on cortico-muscular networks. During the sensory conflict, the brain adaptively decreases the integration of conflicting information. Without this integrated information, cortical control over muscles may be lessened, whereas the muscle feedback may be enhanced in compensation.

Structural Brain Alterations in Individuals Post-COVID-19: A Systematic Review / Alteraciones Estructurales Cerebrales en Individuos Post COVID-19: Una Revisión Sistemática

SUMMARY: Although COVID-19 is primarily considered a respiratory pathology, it has been observed to impact other bodily systems, including the nervous system. While several studies have investigated anatomical changes in brain structures, such as volume or thickness post-COVID-19, there are no comprehensive reviews of these changes using imaging techniques for a holistic understanding. The aim of this study was to systematically analyze the literature on brain changes observed through neuroimaging after COVID-19. We conducted a systematic review according to PRISMA guidelines using Web of Science, Scopus, Medline, Pubmed, Sciencedirect, and LitCOVID. We selected studies that included adult patients during or after COVID-19 development, a control group or pre-infection images, and morphometric measurements using neuroimaging. We used the MSQ scale to extract information on sample characteristics, measured anatomical structures, imaging technique, main results, and methodological quality for each study. Out of 1126 identified articles, we included 19 in the review, encompassing 1155 cases and 1284 controls. The results of these studies indicated a lower volume of the olfactory bulb and variable increases or decreases in cortical and limbic structures' volumes and thicknesses. Studies suggest that brain changes occur post-COVID-19, primarily characterized by a smaller olfactory bulb. Additionally, there may be variations in cortical and limbic volumes and thicknesses due to inflammation or neuroplasticity, but these findings are not definitive. These differences may be attributed to methodological, geographical, and temporal variations between studies. Thus, additional studies are required to provide a more comprehensive and quantitative view of the evidence.

Aunque el COVID-19 se considera principalmente una patología respiratoria, se ha observado que afecta otros sistemas corporales, incluido el sistema nervioso. Si bien varios estudios han investigado los cambios anatómicos en las estructuras cerebrales, como el volumen o el grosor posteriores a la COVID-19, no hay revisiones exhaustivas de estos cambios que utilicen técnicas de imágenes para una comprensión holística. El objetivo de este estudio fue analizar sistemáticamente la literature sobre los cambios cerebrales observados a través de neuroimagen después de COVID-19. Realizamos una revisión sistemática de acuerdo con las pautas PRISMA utilizando Web of Science, Scopus, Medline, Pubmed, Sciencedirect y LitCOVID. Seleccionamos estudios que incluyeron pacientes adultos durante o después del desarrollo de COVID-19, un grupo de control o imágenes previas a la infección y mediciones morfométricas mediante neuroimagen. Utilizamos la escala MSQ para extraer información sobre las características de la muestra, las estructuras anatómicas medidas, la técnica de imagen, los principales resultados y la calidad metodológica de cada estudio. De 1126 artículos identificados, incluimos 19 en la revisión, que abarca 1155 casos y 1284 controles. Los resultados de estos estudios indicaron un menor volumen del bulbo olfatorio y aumentos o disminuciones variables en los volúmenes y espesores de las estructuras corticales y límbicas. Los estudios sugieren que los cambios cerebrales ocurren después del COVID-19, caracterizados principalmente por un bulbo olfatorio más pequeño. Además, pueden haber variaciones en los volúmenes y grosores corticales y límbicos debido a la inflamación o la neuroplasticidad, pero estos hallazgos no son definitivos. Estas diferencias pueden atribuirse a variaciones metodológicas, geográficas y temporales entre estudios. Por lo tanto, se requieren estudios adicionales para proporcionar una visión más completa y cuantitativa de la evidencia.

Protective Effects and Mechanisms of Huangqi Decoction Against Radiation-Induced Bystander Effects / Efectos Protectores y Mecanismos de la Decocción de Huangqi Contra los Efectos Secundarios Inducidos por la Radiación

SUMMARY: The 12C6+ heavy ion beam irradiation can cause bystander effects. The inflammatory cytokines, endocrine hormones and apoptotic proteins may be involved in 12C6+ irradiation-induced bystander effects. This study characterized the protective effects and mechanisms of Huangqi decoction (HQD) against 12C6+ radiation induced bystander effects. Wistar rats were randomly divided into control, 12C6+ heavy ion irradiation model, and high-dose/medium-dose/low-dose HQD groups. HE staining assessed the pathological changes of brain and kidney. Peripheral blood chemical indicators as well as inflammatory factors and endocrine hormones were detected. Apoptosis was measured with TUNEL. Proliferating cell nuclear antigen (PCNA) expression was determined with real-time PCR and Western blot.Irradiation induced pathological damage to the brain and kidney tissues. After irradiation, the numbers of white blood cells (WBC) and monocyte, and the expression of interleukin (IL)-2, corticotropin-releasing hormone (CRH) and PCNA decreased. The damage was accompanied by increased expression of IL-1β, IL-6, corticosterone (CORT) and adrenocorticotropic hormone (ACTH) as well as increased neuronal apoptosis. These effects were indicative of radiation-induced bystander effects. Administration of HQD attenuated the pathological damage to brain and kidney tissues, and increased the numbers of WBC, neutrophils, lymphocyte and monocytes, as well as the expression of IL-2, CRH and PCNA. It also decreased the expression of IL-1β, IL-6, CORT and ACTH as well as neuronal apoptosis. HQD exhibits protective effects against 12C6+ radiation-induced bystander effects. The underlying mechanism may involve the promotion of the production of peripheral blood cells, inhibition of inflammatory factors and apoptosis, and regulation of endocrine hormones.

La irradiación con haz de iones pesados 12C6+ puede provocar efectos secundarios. Las citoquinas inflamatorias, las hormonas endocrinas y las proteínas apoptóticas pueden estar involucradas en los efectos secundarios inducidos por la irradiación 12C6+. Este estudio caracterizó los efectos y mecanismos protectores de la decocción de Huangqi (HQD) contra los efectos externos inducidos por la radiación 12C6+. Las ratas Wistar se dividieron aleatoriamente en grupos control, modelo de irradiación de iones pesados 12C6+ y grupos de dosis alta/media/baja de HQD. La tinción con HE evaluó los cambios patológicos del cerebro y el riñón. Se detectaron indicadores químicos de sangre periférica, así como factores inflamatorios y hormonas endocrinas. La apoptosis se midió con TUNEL. La expresión del antígeno nuclear de células en proliferación (PCNA) se determinó mediante PCR en tiempo real y transferencia Western blot. La irradiación indujo daños patológicos en los tejidos cerebrales y renales. Después de la irradiación, disminuyó el número de glóbulos blancos (WBC) y monocitos, y la expresión de interleucina (IL)-2, hormona liberadora de corticotropina (CRH) y PCNA. El daño estuvo acompañado por una mayor expresión de IL-1β, IL-6, corticosterona (CORT) y hormona adrenocorticotrópica (ACTH), así como un aumento de la apoptosis neuronal. Estas alteraciones fueron indicativas de efectos inducidos por la radiación. La administración de HQD atenuó el daño patológico a los tejidos cerebrales y renales, y aumentó el número de leucocitos y monocitos, así como la expresión de IL-2, CRH y PCNA. También disminuyó la expresión de IL-1β, IL-6, CORT y ACTH, así como la apoptosis neuronal. HQD exhibe mecanismos protectores contra los efectos externos inducidos por la radiación 12C6+. El mecanismo subyacente puede implicar la promoción de la producción de células sanguíneas periféricas, la inhibición de factores inflamatorios y la apoptosis y la regulación de hormonas endocrinas.

Ejercicio físico como intervención en personas en alto riesgo clínico de psicosis: revisión narrativa / Physical exercise as an intervention in people at clinical high-risk for psychosis: a narrative review

El constructo de alto riesgo clínico de psicosis ha favorecido la investigación en la neurobiología de los estadios previos a la psicosis, así como también en intervenciones preventivas. Se trata de personas jóvenes que presentan síntomas psicóticos de menor intensidad o de menor frecuencia en un tiempo determinado, o bien tienen antecedentes genéticos de trastornos psicóticos sumados a un deterioro significativo del funcionamiento. Las escasas intervenciones existentes para esta población cuentan con un bajo nivel de evidencia. La actividad y el ejercicio físico han demostrado ser parte de la terapia de múltiples trastornos psiquiátricos, mientras que el sedentarismo sería un factor favorecedor de la psicosis. Efectivamente, las personas en alto riesgo clínico de psicosis presentan un peor estado físico asociado a mayor sedentarismo y hábitos de vida poco saludables. Se ha propuesto que el ejercicio genera un efecto biológico positivo sobre el hipocampo y las áreas circundantes, regiones que estarían involucradas en la fisiopatología de la psicosis. Algunos estudios experimentales han mostrado una disminución en la sintomatología psicótica en pacientes en alto riesgo clínico de psicosis que han seguido pautas de ejercicio físico. También dan cuenta de cambios morfofuncionales en estructuras cerebrales. Si bien existen barreras para la implementación de esta intervención, se trata de una intervención segura y factible. Es necesario realizar una mayor cantidad de estudios experimentales de una escala mayor para medir su eficacia, generando evidencia científica que permita eventualmente integrar el ejercicio físico a las guías de práctica clínica como una recomendación sistemática.

The concept of clinical high risk for psychosis has favored research in the neurobiology of the stages prior to psychosis, as well as in preventive interventions. This group is made up of young people with: (1) psychotic symptoms of less intensity or less frequency during a brief time or having genetic history of psychotic disorders associated to a significant deterioration in functioning. The few existing interventions for this population have a low level of evidence. Physical activity and exercise have been shown to be part of the therapy for multiple psychiatric disorders, while a sedentary lifestyle would be a factor that favors psychosis. Indeed, people in clinical high risk for psychosis present a worse physical condition associated with a greater sedentary lifestyle and unhealthy habits. It has been proposed that exercise generates a positive biological effect on the hippocampus and surrounding areas, regions that would be involved in the pathophysiology of psychosis. Some experimental studies have shown a decrease in psychotic symptoms in patients with clinical high risk for psychosis who have followed physical exercise guidelines, as well as morphofunctional changes in brain structures. Although there are barriers to the implementation of this intervention, it is safe and feasible. It is necessary to conduct a greater number of experimental studies on a larger scale to measure its efficacy, generating scientific evidence that will eventually allow physical exercise to be included in clinical practice guidelines as a systematic recommendation for clinical high risk for psychosis.

Fístula nasal de líquido cefalorraquídeo post-traumática. Resultados de la implementación de un protocolo de trabajo / Post-traumatic cerebrospinal fluid nasal leak. Results of the implementation of a work protocol

Introducción: Los pacientes con fracturas de base de cráneo anterior post traumatismo encéfalo-craneano tienen alto riesgo de fístula de líquido céfalo-raquídeo por las fosas nasales. Es importante el manejo oportuno y apropiado, evitando así complicaciones; razón por la cual se desarrolló el "protocolo HP" para su tratamiento quirúrgico. Objetivo: Comunicar la utilidad del "protocolo HP" en el manejo de la fístula de líquido céfalo-raquídeo de la base de cráneo anterior. Materiales y métodos: Estudio transversal retrospectivo con pacientes ≥ 15 años con diagnóstico de fístula de líquido céfalo-raquídeo nasal post traumatismo encéfalo-craneano, desde 1/1/2016 hasta 31/8/2021 que ingresaron al hospital y requirieron cirugía de reparación, con 28 pacientes incluidos, el valor p ˂0,05 (estadísticamente significativo). Resultados: 96,4% hombres, mayoría adultos jóvenes con traumatismo encéfalo-craneano leve; 82,1% presentó fístula de líquido céfalo-raquídeo temprana. Todos requirieron reparación transcraneal frontal, en 67,9% fue bilateral. La reparación antes de los 7 días fue en el 39,3%, 7-21 días en 46,4% y después de 21 días en 14,3% de los casos. Uso de drenaje lumbar continuo: preoperatorio 10,7%, intraoperatorio 60,7%, postoperatorio 46,4%. En el 89,3% la ubicación de la fístula de líquido céfalo-raquídeo intra-quirúrgica fue congruente con la tomografía. Desde el 2020 se sistematizó el manejo de las fístula de líquido céfalo-raquídeo. La recurrencia fue de 10,7% antes del 2020 (posteriormente fue de 0%), asociándose con Glasgow bajo e inicio de fístula de líquido céfalo-raquídeo 7 días post traumatismo encéfalo-craneano (p˂0,05). Complicaciones encontradas: meningitis 28,6%, convulsión 25%, anosmia 14,3%, neumoencéfalo a tensión 7,1% y absceso 3,6%. Mortalidad por fístula de líquido céfalo-raquídeo: 3,6%. Curación 96,4%. Conclusiones: La aplicación del "Protocolo HP" tuvo resultados satisfactorios. La tasa de recurrencia postoperatoria de fístula de líquido céfalo-raquídeo nasal post traumatismo encéfalo-craneano fue 0%(AU)

Background: Patients with anterior skull base fractures after traumatic brain injury have a high risk of cerebrospinal fluid leak through the nostrils. Timely and appropriate management is important, avoiding complications. The "HP protocol" for surgical treatment was developed. Objectives: To communicate the utility of the "HP protocol" in the management of the anterior skull base cerebrospinal fluid leak. Methods: Retrospective cross-sectional study; patients ≥ 15 years old with a diagnosis of nasal cerebrospinal fluid leak after traumatic brain injury, who were admitted at the hospital from 1/1/2016 to 8/31/2021 and required surgery. Included 28 patients, p value ˂0.05 (statistically significant). Results: 96.4% men, mostly young adults with mild traumatic brain injury; 82.1% presented early cerebrospinal fluid leak. All required frontal transcranial repair, in 67.9% it was bilateral. Repair before 7 days was in 39.3%, 7-21 days in 46.4%, and after 21 days in 14.3%. Use of continuous lumbar drainage: preoperative 10.7%, intraoperative 60.7%, postoperative 46.4%. In 89.3%, the location of the intraoperative cerebrospinal fluid leak was consistent with the CT scan. Since 2020, the management of the cerebrospinal fluid leak was systematized. The recurrence was 10.7% before 2020; after it was 0% and associated with low Glasgow and onset of cerebrospinal fluid leak 7 days after traumatic brain injury (p<0.05). Complications: meningitis 28.6%, seizure 25%, anosmia 14.3%, high tension pneumocephalus 7.1% and abscess 3.6%. Cerebrospinal fluid leak mortality: 3.6%. Cure 96.4%. Conclusions: The application of the "HP Protocol" had satisfactory results. The post traumatic brain injury nasal cerebrospinal fluid leak recurrence rate was 0%

Disfunción hipofisaria post traumatismo encefalocraneano / Pituitary Dysfunction after Brain Injury

Introducción. El hipopituitarismo debe detectarse precozmente en pacientes con traumatismo encéfalo craneano por la alta morbi-mortalidad asociada. Objetivo. Analizar la disfunción hormonal hipofisaria post traumatismo encéfalo craneano y la relación entre su gravedad y las alteraciones hormonales encontradas. Materiales y métodos. Estudio observacional prospectivo, 101 pacientes internados en los servicios de Neurocirugía y Terapia Intensiva del Hospital "Ángel C. Padilla" de San Miguel de Tucumán, Argentina, entre el 1 de mayo y el 30 de junio de 2021. Se registraron datos demográficos, escala de Glasgow, tipo de traumatismo encéfalo craneano, lesiones asociadas, dosajes de hormonas hipotálamo-hipofisarias y natremia en los primeros siete días post traumatismo encéfalo craneano. Resultados. Incluidos 83 hombres y 18 mujeres con predominante afectación entre los 20-29 años (36,6%). El traumatismo encéfalo craneano leve afectó a 7,9%, el traumatismo encéfalo craneano moderado a 59,4% y el traumatismo encéfalo craneano grave a 32,7%. La lesión estructural descripta con mayor frecuencia fue la contusión (43,6%). El 83,2% del total de los pacientes tenían un dosaje de corticotropina normal, mientras que en el 11,9% fue bajo; el 43,5% de los pacientes registraron cortisol alto y en el 10% de los casos fue bajo. La testosterona se vio disminuida en un 42,6% y el resto de las hormonas del eje no tuvieron cambios significativos. La ACTH fue baja en el 11,9% de los traumas graves con una hipernatremia del 22%. Conclusión. Existe relación entre la gravedad del TEC y la disfunción hipofisaria, estando el trauma grave asociado a déficit hormonal de ACTH e hipernatremia(AU)

Background. Hypopituitarism is an event that must be detected early in patients with head injuries, due to the high associated morbidity and mortality. Objectives. To analyze the pituitary dysfunction after a head injury and the correlation between the severity and the hormonal alterations found. Methods. Observational and prospective study. 101 patients hospitalized in the Neurosurgery and Intensive Care Unit of "Ángel C. Padilla" Hospital in San Miguel de Tucumán, Argentina, between May 1 and June 30, 2021. Demographic data, score of Glasgow coma, associated injuries, hypothalamic-pituitary hormone determination and blood sodium levels were recorded in the first 7 days after brain injury. Results. A total of 83 men and 18 women were affected with predominant involvement between 20-29 years (36.6%). Mild head trauma affected 7.9%, moderate 59.4%, and severe 32.7%. The most frequently described structural lesion was contusion (43.6%). 83.2% of all patients had a normal dose of corticotropin, while in 11.9% it was low; High cortisol was recorded in 43.5% of the patients and low in 10% of the cases. Testosterone was reduced by 42.6% and the rest of the pituitary hormones had no significant changes. ACTH was low in 11.9% of severe trauma with hypernatremia in 22%. Conclusion. There is a relationship between the severity of traumatic brain injury and pituitary dysfunction, with major severity of trauma associated to corticotropin deficiency and hypernatremia(AU)

Capítulo 15: cerebelo / Chapter 15: Cerebellum

El cerebelo ocupa la fosa posterior (foto 15-1), por debajo del tentorio, y por delante del tronco cerebral al cual está unido sólo por tres estructuras , llamadas pedúnculos cerebelosos. El cerebelo, sólo representa un 10% del peso del encéfalo, pero contiene la mitad de las neuronas del mismo.

Síndrome de hipertensión intracraneana como manifestación inhabitual del síndrome de Sjögren. Caso clínico / Intracranial hypertension syndrome as an unusual manifestation of Sjögren's syndrome. Report of one case

Neurological manifestations such as polyneuropathy are reported in 8-49% of cases with Sjögren's Syndrome (SjS), but central nervous system involvement is seldom described. We report a 46-year-old woman with a history of SjS with distal renal tubular acidosis and autoimmune thyroiditis. She consulted in the emergency room for a five-days history of holocranial headache and explosive vomiting. Fundoscopy showed bilateral papilledema. Brain computed tomography (CT) without contrast showed diffuse encephalic edema, with effacement ofsulci and restriction ofperitruncal cisterns. Brain AngioCT ruled out thrombosis, and brain magnetic resonance (MRI) was without structural alterations or hydrocephalus. Lumbar puncture had increased cerebrospinal fluid output pressure but without cytochemical alterations, and negative gram, cultures and filmarray. The diagnosis of Intracranial Hypertension Syndrome (ICHTS) ofprobable autoimmune etiology in the context of SjS was proposed, and management with high-dose corticosteroids was initiated with favorable clinical and imaging response.

Corneal Perforation associated with "Silent Brain Syndrome" / Perfuração corneana associada à "síndrome do cérebro silencioso"

ABSTRACT This case report describes the clinical characteristics and ophthalmic management of a patient who developed corneal perforation due to severe enophthalmos consistent with "silent brain syndrome." A 27-year-old man with a history of congenital hydrocephalus and ventriculoperitoneal shunt was referred with complaints of "sinking of the eyeballs" and progressively decreasing vision in the left eye. Examination revealed severe bilateral enophthalmos in addition to superonasal corneal perforation with iris prolapse in the left eye. The patient underwent therapeutic keratoplasty the next day. Orbital reconstruction with costochondral graft and shunt revision of the intracranial hypotension were performed the next month to prevent further progression.

RESUMO Este relato de caso descreve as características clínicas e o manejo cirúrgico de um paciente que teve perfuração da córnea devido à enoftalmia grave consistente com a "síndrome do cérebro silencioso". Um homem de 27 anos com história de hidrocefalia congênita e derivação ventrículo-peritoneal foi encaminhado com queixas de "afundamento dos globos oculares" e diminuição progressiva da visão no olho esquerdo. O exame revelou enoftalmo bilateral importante, além de perfuração superonasal da córnea com prolapso iriano no olho esquerdo. A paciente foi submetida à ceratoplastia terapêutica no dia seguinte. Foi realizado no mês seguinte a reconstrução da órbita com enxerto costocondral e revisão do shunt para evitar progressão e piora do caso.

Dissecação anatômica como estratégia para o estudo do sistema neural em fetos humanos / Anatomic dissection as a strategy for the study of the neural system in fetuses / Disección anatómica como estrategia para el estudio del sistema neural en fetos

Esse trabalho busca relatar o processo de confecção de peças anatômicas para o ensino da anatomia humana a partir de material cadavérico fetal. Os discentes do curso de medicina da Universidade Federal do Paraná (UFPR) ­ Campus Toledo participaram do programa de voluntariado acadêmico e deram atenção especial aos aspectos técnicos do processo de dissecação, bem como a experiência subjetiva desse procedimento como ferramenta de aprendizado ativo. O procedimento foi realizado na sala de preparação de cadáver da UFPR ­ Campus Toledo, utilizando instrumental de dissecação e cadáveres humanos fetais com 20, 17 e 14 semanas de idade gestacional, direcionado de modo a expor as partes constituintes do sistema neural. Foram confeccionadas peças de cérebro, cerebelo, tronco encefálico, medula espinal, nervos espinais e suas estruturas associadas. Os voluntários envolvidos foram capazes de produzir material de estudo de qualidade através da dissecação e fortalecer seu conhecimento em anatomia humana e aptidão manual. Também foi dada atenção à importância e às limitações do processo de dissecação como estratégia de aprendizado em cursos da área de saúde. pôde ser observado que a dissecação pode fazer parte de uma formação completa e bem estruturada dos discentes, que por sua vez irão integrar a sociedade e a academia. Além disso, a exposição da topografia neural fetal pode servir de referencial para posteriores estudos que venham a utilizar essas informações.

This work aims to report the confection process of anatomic pieces for teaching human anatomy from fetal cadaveric material. The students of the medicine course of Universidade Federal do Paraná (UFPR) ­ Campus Toledo, took part in the academic volunteer program and paid special attention to the technical aspects of the dissection process, as well as the subjective experience of this procedure as an active learning tool. The procedure was performed at the cadaver preparation room of the UFPR ­ Campus Toledo, using dissection tools and human fetal corpses of 20, 17 and 14 weeks of gestational ages, directed so as to expose the constituent parts of the neural system. Pieces of the brain, cerebellum, brainstem, spinal cord, spinal nerves, and its associated structures were made. The involved voluntaries were able to produce quality study material through dissection, and strengthen their knowledge in human anatomy and manual skill. Attention was also given to the importance and limitations of the dissection process as a learning strategy in health courses. it was observed that dissection can be part of a complete and well-structured training of students, who in turn will integrate society and academia. In addition, the exposure of fetal neural topography can serve as a reference for further studies that use this information

Este trabajo tiene como objetivo relatar el proceso de confección de piezas anatómicas para la enseñanza de la anatomía humana a partir de material cadavérico fetal. Los alumnos del curso de medicina de la Universidade Federal do Paraná (UFPR) - Campus Toledo, participaron del programa de voluntariado académico y prestaron especial atención a los aspectos técnicos del proceso de disección, así como a la vivencia subjetiva de este procedimiento como herramienta de aprendizaje activo. El procedimiento fue realizado en la sala de preparación de cadáveres de la UFPR - Campus Toledo, utilizando herramientas de disección y cadáveres de fetos humanos de 20, 17 y 14 semanas de edad gestacional, dirigidos de forma a exponer las partes constitutivas del sistema neural. Se realizaron piezas del cerebro, cerebelo, tronco encefálico, médula espinal, nervios espinales y sus estructuras asociadas. Los voluntarios participantes pudieron elaborar material de estudio de calidad mediante la disección y reforzar sus conocimientos de anatomía humana y habilidad manual. También se prestó atención a la importancia y las limitaciones del proceso de disección como estrategia de aprendizaje en los cursos de salud. Se observó que la disección puede formar parte de una formación completa y bien estructurada de los estudiantes, que a su vez integrarán la sociedad y el mundo académico. Además, la exposición de la topografía neural fetal puede servir de referencia para estudios posteriores que utilicen esta información.

Evaluation of PET Mainstream Scattering Correction Methods / 中国医疗器械杂志

OBJECTIVE@#Current mainstream PET scattering correction methods are introduced and evaluated horizontally, and finally, the existing problems and development direction of scattering correction are discussed.@*METHODS@#Based on NeuWise Pro PET/CT products of Neusoft Medical System Co. Ltd. , the simulation experiment is carried out to evaluate the influence of radionuclide distribution out of FOV (field of view) on the scattering estimation accuracy of each method.@*RESULTS@#The scattering events produced by radionuclide out of FOV have an obvious impact on the spatial distribution of scattering, which should be considered in the model. The scattering estimation accuracy of Monte Carlo method is higher than single scatter simulation (SSS).@*CONCLUSIONS@#Clinically, if the activity of the adjacent parts out of the FOV is high, such as brain, liver, kidney and bladder, it is likely to lead to the deviation of scattering estimation. Considering the Monte Carlo scattering estimation of the distribution of radionuclide out of FOV, it's helpful to improve the accuracy of scattering distribution estimation.

Progress on Prevention and Treatment of Cerebral Small Vascular Disease Using Integrative Medicine / 中国结合医学杂志

Cerebral small vessel disease (CSVD) is a senile brain lesion caused by the abnormal structure and function of arterioles, venules and capillaries in the aging brain. The etiology of CSVD is complex, and disease is often asymptomatic in its early stages. However, as CSVD develops, brain disorders may occur, such as stroke, cognitive dysfunction, dyskinesia and mood disorders, and heart, kidney, eye and systemic disorders. As the population continues to age, the burden of CSVD is increasing. Moreover, there is an urgent need for better screening methods and diagnostic markers for CSVD, in addition to preventive and asymptomatic- and mild-stage treatments. Integrative medicine (IM), which combines the holistic concepts and syndrome differentiations of Chinese medicine with modern medical perspectives, has unique advantages for the prevention and treatment of CSVD. In this review, we summarize the biological markers, ultrasound and imaging features, disease-related genes and risk factors relevant to CSVD diagnosis and screening. Furthermore, we discuss IM-based CSVD prevention and treatment strategies to stimulate further research in this field.