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1.
Front Psychol ; 15: 1325188, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38505362

RESUMO

In Mexico, shamans are recognized for the gift of entering a deep trance that allows them to know the origin of the diseases and conflicts that afflict people. They commonly treat patients through limpias (cleansing) to extract negative elements sent by a witch or that were "collected" in places that harbor "evil winds." We present a case study of an 81-year-old Mexican shaman who noticed her gift in childhood. Electroencephalographic recordings were made while the shaman performed three activities: reading cards to diagnose a patient and answer the questions he posed; limpia with chicken eggs, stones, and bells to absorb adverse "things"; and the incorporation trance through which the deceased is believed to occupy the shaman's body to use it as a communication channel. Alpha activity was observed when concentrated, suggesting a hypnagogic-like state. Predominant beta and gamma oscillations were observed, suggesting a potential plastic phenomenon that modulates the assimilation of external and internal referents guiding temporal schemes for action, attention, and the integration of mnemonic, sensory, and imaginative elements. We used a neuroanthropological approach to understand shamanic trance as a biological potential of the human brain to induce non-ordinary states of consciousness linked to cultural beliefs and practices.

2.
Front Psychol ; 14: 1141829, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37187565

RESUMO

Listening to music has progressively been proposed as a complementary alternative for chronic pain; understanding its properties and its neurobiological bases is urgent. We show a phenomenological investigation of a woman who has lived 20 years with chronic pain. The inquiry involved her experience of the context in which she listens to music, the intensity and quality of pain, body mapping, memories, emotions, and cognition. The participant listens to music for different reasons, such as pain and anxiety relief, motivation to exercise, and quality of sleep, but all seem to revolve around different strategies for pain management. Experiences in physiological and cognitive aspects included perceived restorative sleep that may have improved the participant's general wellbeing and improved cognitive and motor performance as well as communication skills. The music enabled the participant not only to relieve pain but also withdrawal effects after discontinuing her opioid-based treatment. These effects may encompass endogenous opioid and dopamine mechanisms involving natural analgesia associated with pleasurable experiences. Future studies could consider phenomenological case studies and therapeutic accompaniment to reorient subjective properties of pain and expand quantitative and qualitative knowledge for more comprehensive reports on music and analgesia.

3.
Sci Rep ; 12(1): 16337, 2022 09 29.
Artigo em Inglês | MEDLINE | ID: mdl-36175533

RESUMO

Anticipation of trust from someone with high social closeness is expected. However, if there is uncertainty in the interaction because a person is a stranger or because he has distrusted us on another occasion, we need to keep track of his behavior and intentions. Using functional Magnetic Resonance Imaging (fMRI) we wanted to find the brain regions related to trust anticipation from partners who differ in their level of social closeness. We designed an experiment in which 30 participants played an adapted trust game with three trustors: A computer, a stranger, and a real friend. We covertly manipulated their decisions in the game, so they trusted 75% of the trials and distrusted in remaining trials. Using a psychophysiological interaction analysis, we found increases in functional coupling between the anterior insula (AIns) and intra parietal sulcus (IPS) during trust anticipation between a high versus low social closeness partner. Also, the right parietal cortex was coupled with the fusiform gyrus (FG) and the inferior/middle temporal gyrus during trust anticipation of a friend versus a stranger. These results suggest that brain regions involved in encoding the intentions of others are recruited during trust anticipation from a friend compared to a stranger.


Assuntos
Cabeça , Confiança , Encéfalo/diagnóstico por imagem , Humanos , Masculino , Psicofisiologia , Lobo Temporal
4.
Front Psychol ; 13: 992935, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36176793

RESUMO

Different theoretical models have proposed cognitive and affective components in empathy and moral judgments encompassing compassion. Furthermore, gender differences in psychological and neural functions involving empathic and moral processing, as well as compassionate experiences, have been reported. However, the neurobiological function regarding affective and cognitive integration underlying compassion and gender-associated differences has not been investigated. In this study, we aimed to examine the interaction between cognitive and emotional components through functional connectivity analyzes and to explore gender differences for the recruitment and interaction of these components. Thirty-six healthy participants (21-56 years; 21 women) were exposed to social images in an fMRI session to judge whether the stimuli elicited compassion. The results showed a different connectivity pattern for women and men of the insular cortex, the dorsomedial prefrontal cortex (dmPFC), the orbitofrontal cortex (OFC), and the cingulate cortex. The integration of affective and cognitive components follows a complex functional connectivity pattern that is different for both genders. These differences may indicate that men largely make compassionate judgments based on contextual information, while women tend to notably take internal and introspective processes into account. Women and men can use different affective and cognitive routes that could converge in similar learning of moral values, empathic experiences and compassionate acts.

5.
Neuroscience ; 492: 82-91, 2022 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-35398508

RESUMO

In a therapeutic environment a proper regulation of the empathic response strengthens the patient-therapist relationship. Thus, it is important that psychotherapists constantly regulate their own perspective and emotions to better understand the other's affective state. We compared the empathic abilities of a group of 52 psychotherapists with a group of 92 non-psychotherapists and found psychometric differences. Psychotherapists showed greater scores in Fantasy and Perspective Taking, both cognitive empathy constructs, and lower scores in the use of expressive suppression, an emotional regulation strategy that hampers the empathic response, suggesting that psychotherapists exert top-down processes that influence their empathic response. In addition, the expected sex differences in empathic concern and expressive suppression were only present in the non-psychotherapist group. To see if such psychometric differences were related to a distinctive functional organization of brain networks, we contrasted the resting state functional connectivity of empathy-related brain regions between a group of 18 experienced psychotherapists and a group of 18 non-psychotherapists. Psychotherapists showed greater functional connectivity between the left anterior insula and the dorsomedial prefrontal cortex, and less connectivity between rostral anterior cingulate cortex and the orbito prefrontal cortex. Both associations correlated with Perspective Taking scores. Considering that the psychometric differences between groups were in the cognitive domain and that the functional connectivity associations involve areas related to cognitive regulation processes, these results suggest a relationship between the functional brain organization of psychotherapists and the cognitive regulation of their empathic response.


Assuntos
Empatia , Psicoterapeutas , Encéfalo/diagnóstico por imagem , Encéfalo/fisiologia , Mapeamento Encefálico , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino
6.
Int J Drug Policy ; 99: 103440, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34535365

RESUMO

INTRODUCTION: People who live on the streets in Mexico commonly use inhalants to induce psychoactive effects. Research on the distribution, sale, and consumption of these substances is scarce and mostly focuses on men, which limits the understanding of their use and possible public policies. Our ethnographic research concentrates on women who live and work on the street under marginalized conditions in Mexico City. METHODS: A Grounded Theory approach was used to frame the two-year-long field work. A field diary was kept for the multi-sited ethnography and participant observations in street-based settings, as well as five in-depth interviews with female distributors, sellers, and/or users of inhalants. Data was analyzed based on four dimensions: biography, representation as a dealer or user, social dynamics, and geographical distribution of networks to distribute, sell, and use inhalants. RESULTS: Women involved in the distribution, sale and use of inhalants are motivated by gender violence and socioeconomic vulnerability. They shape reciprocity networks to purchase inhalants in dangerous urban areas and avoid being mugged and physically or sexually assaulted. Although men are the ones who offer protection, women employ women to sell the inhalants and strengthen trust in the community. Distribution begins in clandestine places where combinations of unknown solvents are prepared in 20-L containers. Each liter is supplied for 1.92 USD to be retailed in 9.58 USD per liter in the streets. Particular language and cultural street-codes are necessary conditions in distribution and sales points for safe use and protection from authorities and out-group members. CONCLUSION: Trust and cooperation are crucial in reciprocity networks formed by women who distribute, sell and use inhalants in the streets. These networks compensate for the lack of social security and safety, empower women in the street community, and provide income needed to survive marginality.


Assuntos
Confiança , Violência , Antropologia Cultural , Feminino , Humanos , Masculino , México , Comportamento Sexual
7.
Metab Syndr Relat Disord ; 19(9): 513-523, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34314624

RESUMO

Background: Child malnutrition represents a major public health problem with physiological, psychological, and social short- and long-term implications. Objective: To compare the influence of nutritional status on oxidative stress (OS) markers in children aged 3-6 years. Methods: Children were categorized into four groups: underweight, normal weight, overweight, and obesity. Glucose (Glu), cholesterol (Chol), high-density lipoproteins, insulin, triacylglycerols (TG), triacylglycerols/glucose (TyG) index, and the homeostasis model assessment of insulin resistance (HOMA-IR) were analyzed. In addition, OS [malondialdehyde (MDA) and 3-nitrotyrosine (3-NT)] and antioxidant defense markers [superoxide dismutase (SOD), catalase (CAT), and the ratio of reduced/oxidized glutathione (GSH/GSSG)] were quantified. Results: Children with obesity showed significantly higher levels of MDA and 3-NT, and increased SOD activity compared with normal weight children. Glu, Chol, TG levels, TyG indexes, HOMA-IR, MDA, 3-NT, and SOD positively correlated with body mass index (BMI) and Centers for Disease Control and Prevention percentiles (CDC PC). However, CAT concentration and the GSH/GSSG ratio correlated negatively with BMI and CDC PC. In children with underweight, we found a positive correlation of TG levels and TyG indexes with BMI, whereas both markers positively correlated with BMI and CDC PC in children with overweight. MDA negatively correlated with BMI in children with underweight, while a positive association was observed in children with overweight. Finally, SOD, CAT, and GSH/GSSG negatively correlated with both BMI and CDC PC in children with overweight. Conclusions: Malnutrition, especially obesity, is associated with metabolic and OS disturbances in preschool children. It is urgent to design strategies to prevent malnutrition in this age group since this stage of development is crucial to potentially avoid future co-morbidities.


Assuntos
Resistência à Insulina , Estado Nutricional , Estresse Oxidativo , Criança , Pré-Escolar , Humanos , Resistência à Insulina/fisiologia , Estado Nutricional/fisiologia , Estresse Oxidativo/fisiologia , Estados Unidos
8.
Sleep Health ; 6(2): 192-196, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-31879094

RESUMO

Homeless people face stressful circumstances influencing drug consumption, mental health, and sleep disorders. We performed an interdisciplinary study involving psychometric, polysomnographic, and ethnographic records to relate stress, psychiatric disorders, drug consumption, and sleep in ten people (four women, M = 32 y/o) living on the streets of Mexico City. Toluene-based inhalant dependence and suicidality were the more common psychiatric disorders among participants. They also presented sleep fragmentation; some manifested insomnia or sleep restriction, whereas others displayed extended rapid-eye movement sleep latencies associated with depression or inhalant consumption. Inhalants are used to improve mood, strengthen social bonds, and induce either sleep or alertness during the night. Inter-individual distinctions may be related to differential levels of intoxication, stress perception, backgrounds, and abilities to live and sleep on the street. Sleep restriction seems to be the more common factor, which may enhance the negative consequences of street situation.


Assuntos
Pessoas Mal Alojadas/psicologia , Abuso de Inalantes/psicologia , Transtornos Mentais/psicologia , Sono , Estresse Psicológico/psicologia , Adulto , Feminino , Pessoas Mal Alojadas/estatística & dados numéricos , Humanos , Masculino , México , Distúrbios do Início e da Manutenção do Sono/psicologia , Fatores de Tempo
9.
Curr Med Chem ; 26(19): 3613-3619, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-28521684

RESUMO

Metabolic syndrome is a frequent metabolic disorder characterized by obesity and insulin resistance seems to be the main pathophysiological alteration. The goal of treating metabolic syndrome is to reduce the risk of coronary heart disease and the development of type 2 diabetes. The lifestyle modification therapy combines specific recommendations on diet alone or combined with other strategies. In this review, we address the following topics: 1) the importance of the high prevalence of metabolic syndrome and obesity, and 2) the role of lifestyle modification focusing on dietary fat intake in the management of MS.


Assuntos
Dieta Mediterrânea , Síndrome Metabólica/terapia , Obesidade/terapia , Doença das Coronárias/prevenção & controle , Diabetes Mellitus Tipo 2/prevenção & controle , Humanos , Síndrome Metabólica/etiologia , Obesidade/complicações , Redução de Peso
10.
IBRO Rep ; 5: 54-59, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30211338

RESUMO

Anthropomorphism implies the attribution of human like emotions and cognition to non-human animals. This tendency may be conditioned by similar morphologies between mammals and is particularly important in primatology. Some neurocognitive findings suggest that prefrontal brain activity associated to conceptual learning influences anthropomorphic judgments, nevertheless, individual differences are also presented indicating that training on primate behavior may influence anthropomorphism. We identified and interpreted brain activity registered by functional magnetic resonance imaging while seven trained primatologists (39.42 ± 10.86 yr.) inferred emotions in human primates, non-human primates and non-primate animals; comparisons were made with seven matched scholars with no primatological training (38.71 ± 9.34 yr.). Primatologists manifested cerebellar, occipital and frontal activity related to sensory and motor processes when valuating humans and non-human primates, but not for other animals. So, primatological training and experience may elicit brain plasticity processes allowing inner motor and sensory models through frontal and cerebellar interactions.

11.
PLoS One ; 10(8): e0135449, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26263162

RESUMO

BACKGROUND: Previous studies of SCA2 have revealed significant degeneration of white matter tracts in cerebellar and cerebral regions. The motor deficit in these patients may be attributable to the degradation of projection fibers associated with the underlying neurodegenerative process. However, this relationship remains unclear. Statistical analysis of diffusion tensor imaging enables an unbiased whole-brain quantitative comparison of the diffusion proprieties of white matter tracts in vivo. METHODS: Fourteen genetically confirmed SCA2 patients and aged-matched healthy controls participated in the study. Tract-based spatial statistics were performed to analyze structural white matter damage using two different measurements: fractional anisotropy (FA) and mean diffusivity (MD). Significant diffusion differences were correlated with the patient's ataxia impairment. RESULTS: Our analysis revealed decreased FA mainly in the inferior/middle/superior cerebellar peduncles, the bilateral posterior limb of the internal capsule and the bilateral superior corona radiata. Increases in MD were found mainly in cerebellar white matter, medial lemniscus, and middle cerebellar peduncle, among other regions. Clinical impairment measured with the SARA score correlated with FA in superior parietal white matter and bilateral anterior corona radiata. Correlations with MD were found in cerebellar white matter and the middle cerebellar peduncle. CONCLUSION: Our findings show significant correlations between diffusion measurements in key areas affected in SCA2 and measures of motor impairment, suggesting a disruption of information flow between motor and sensory-integration areas. These findings result in a more comprehensive view of the clinical impact of the white matter degeneration in SCA2.


Assuntos
Ataxia/diagnóstico , Ataxia/patologia , Substância Branca/patologia , Adulto , Estudos de Casos e Controles , Imagem de Difusão por Ressonância Magnética , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Índice de Gravidade de Doença
12.
Mov Disord ; 30(10): 1391-9, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26256273

RESUMO

BACKGROUND: Several neuropathological studies in spinocerebellar ataxia type 2 (SCA2) have revealed significant atrophy of the cerebellum, brainstem, sensorimotor cortex, and several regions in the frontal lobe. However, the impact of the neurodegeneration on the functional integration of the remaining tissue is unknown. To analyze the clinical impact of these functional changes, we correlated the abnormal functional connectivity found in SCA2 patients with their scores in clinical scales. To obtain the functional connectivity changes, we followed two approaches. In one we used areas with significant cerebellar gray matter atrophy as anchor seeds, and in the other we performed a whole-brain data-driven analysis. METHODS: Fourteen genetically confirmed SCA2 patients and aged-matched healthy controls participated in the study. Voxel-based morphometry and resting-state functional magnetic resonance imaging (fMRI) were done to analyze structural and functional brain changes. Independent component analysis and dual regression were used for intrinsic network comparison. Significant functional connectivity differences were correlated with the behavioral scores. RESULTS: Seed-based analysis found reduced functional connectivity within the cerebellum and between the cerebellum and frontal/parietal cortices. Cerebellar functional connectivity increases were found with parietal, frontal, and temporal areas. Intrinsic network analysis found a functional decrease in the cerebellar network, and increase in the default-mode and fronto-parietal networks. Further analysis showed significant correlations between clinical scores and the abnormal functional connectivity strength. CONCLUSION: Our findings show significant correlations between functional connectivity changes in key areas affected in SCA2 and these patients' motor and neuropsychological impairments, adding an important insight to our understanding of the pathophysiology of SCA2.


Assuntos
Cerebelo/fisiopatologia , Córtex Cerebral/fisiopatologia , Transtornos Cognitivos/fisiopatologia , Imageamento por Ressonância Magnética/métodos , Rede Nervosa/fisiopatologia , Desempenho Psicomotor/fisiologia , Ataxias Espinocerebelares/fisiopatologia , Adulto , Transtornos Cognitivos/etiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Ataxias Espinocerebelares/complicações
13.
Front Psychiatry ; 6: 90, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26113822

RESUMO

Spinocerebellar Ataxia Type 2 (SCA2) is a rare genetic disorder producing cerebellar degeneration and affecting motor abilities. Neuroimaging studies also show neurodegeneration in subcortical and cortical regions related to emotional and social processes. From social neuroscience, it is suggested that motor and social abilities can be influenced by particular cultural dynamics so, culture is fundamental to understand the effect of brain-related alterations. Here, we present the first analysis about the cultural elements related to the SCA2 disorder in 15 patients previously evaluated with neuroimaging and psychometric instruments, and their nuclear relationships distributed in six geographical and cultural regions in Mexico. Ethnographic records and photographic and video archives about the quotidian participant's routine were obtained from the patients, their relatives and their caregivers. The information was categorized and interpreted taking into consideration cultural issues and patients' medical files. Our analyses suggest that most of the participants do not understand the nature of the disease and this misunderstanding favors magic and non-medical explanations. Patients' testimonies suggest a decrease in pain perception as well as motor alterations that may be related to interoceptive dysfunctions. Relatives' testimonies indicate patients' lack of social and emotional interests that may be related to frontal, temporal, and cerebellar degeneration. In general, participants use their religious beliefs to deal with the disease and only a few of them trust the health system. Patients and their families are either openly rejected and ignored, tolerated or even helped by their community accordingly to different regional traits. We propose that ethnography can provide social representations to understand the patients' alterations, to formulate neurobiological hypotheses, to develop neurocognitive interventions, and to improve the medical approach to the disease.

14.
Psicooncología (Pozuelo de Alarcón) ; 12(1): 157-170, jun. 2015. tab, graf, ilus
Artigo em Espanhol | IBECS | ID: ibc-138201

RESUMO

Los niños sobrevivientes a cáncer cuya enfermedad y tratamiento involucra al Sistema Nervioso Central, presentan un patrón consistente de deficiencias neurocognoscitivas. En este artículo se describe el estudio de caso de un niño de 9 años diagnosticado con tumor de la fosa posterior sometido a cirugía, quimioterapia y radioterapia. Se aplicó la Batería Neuropsicológica Infantil en 3 momentos: posterior a la cirugía; finalizada la quimioterapia y la radioterapia y después del programa de rehabilitación cognoscitiva. Las evaluaciones neuropsicológicas después de la cirugía, quimio y radioterapia muestran deficiencias en las tareas de Habilidades Gráficas, Atención Visual y Auditiva, Porcentaje de Respuestas Correctas, Diseños Correctos con el Mínimo de Movimientos, Velocidad en la Lectura y la Escritura, Habilidades Gráficas, Codificación Visual, Memoria Verbal y Visual, Percepción Táctil, Repetición y Comprensión del Lenguaje, Habilidades Conceptuales, Fluidez Verbal y Gráfica, Precisión de la Lectura, Composición Narrativa, Conteo, Manejo Numérico y Cálculo. Después de la rehabilitación cognoscitiva observamos un incremento en el puntaje en las tareas de: Habilidades Gráficas, Memoria Verbal, Expresión y Comprensión del lenguaje, Atención Visual y Auditiva, Habilidades Conceptuales, Fluidez Verbal y Gráfica, Conteo, Manejo Numérico, Cálculo y Razonamiento Lógico Matemático. Con la implementación de las medidas normativas de la Evaluación Neuropsicológica Infantil pudimos contrastar el desempeño de nuestro paciente; el cual refleja que el programa de rehabilitación cognoscitiva potencialmente posee la eficacia suficiente para contrarrestar algunas de las secuelas neurocognoscitivas observadas después de la resección del tumor y de la radioterapia y la quimioterapia


Cancer surviving children, whose disease and treatment involves the central nervous system, show a consistent pattern of neurocognitive deficits. We report a case diagnose of a 9 years boy with posterior fossa tumor treated with surgery, chemotherapy and radiotherapy. Neuropsychological evaluation post oncological therapies and post Cognitive Remediation Program (CRP) were made to document the effect of neuropsychological rehabilitation. The results of the post oncological therapies evaluation shows deficits in Constructional Skills, Visual and Auditory Attention, Percentage of Correct Answers and Correct Designs with Minimal Movements, Speed in Reading and Writing, Graphic Skills, Visual Coding, Verbal and Visual Memory, Perception Touch, Repetition and Comprehension of Language, Conceptual Skills, Verbal and Graphics Fluency, Reading Accuracy, Narrative Composition, Count, Numerical and Calculation Management. After CRP our results illustrate an increase in the score of: Graphic Skills, Verbal Memory, Speech and Language Understanding, Conceptual Skills, Verbal and Graphics Fluency, Count, Numerical Management, Calculation and Logical Mathematical Reasoning after CRP. With the implementation of standardized measures of Evaluación Neuropsicológica Infantil we could compare the performance of our patient; which suggests that the CRP has enough potential to counteract some of the neurocognitive sequelae observed after tumor resection and radio and chemotherapy


Assuntos
Criança , Humanos , Masculino , Neoplasias/psicologia , Terapia Cognitivo-Comportamental/métodos , Transtornos do Comportamento Infantil/reabilitação , Testes Neuropsicológicos/estatística & dados numéricos , Transtornos de Deficit da Atenção e do Comportamento Disruptivo/epidemiologia
15.
Soc Neurosci ; 10(2): 135-52, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25372925

RESUMO

Compassion is a prototypical moral emotion supporting cooperation and involves empathic decision-making and motor processes representing the interplay of biologically evolved and cultural mechanisms. We propose a social neuroscience approach to identify gender differences and to assess biological and cultural factors shaping compassion. We consider the police force as a cultural model to study this emotion, because it comprises a mixed-gender group using specific codes for collective safety that influence empathy and cooperativeness. From a sample of Mexican police officers working in a violent environment we integrated ethnographic data categorizing compassionate elements in the officers' activities, psychometric measures evaluating empathic attitudes, and fMRI scans identifying the brain activity related to compassionate experiences and decisions. The results suggest that the police culture influences genders equally with respect to empathic behavioral expressions. Nevertheless, women showed insular and prefrontal cortical activation, suggesting a more empathic experience of compassion. Officers manifested activity in the caudate nucleus, amygdala, and cerebellum, suggesting a more a highly accurate process to infer another's suffering and a reward system motivated by the notion of service and cooperation, both of which are cultural traits represented in the police force.


Assuntos
Encéfalo/fisiologia , Empatia/fisiologia , Cultura Organizacional , Polícia , Adulto , Antropologia Cultural , Atitude , Tomada de Decisões/fisiologia , Eletroencefalografia , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Princípios Morais , Córtex Pré-Frontal/fisiologia , Psicometria , Caracteres Sexuais
16.
J Neurol Sci ; 347(1-2): 50-8, 2014 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-25263602

RESUMO

Spinocerebellar Ataxia Type 2 (SCA2) is a genetic disorder causing cerebellar degeneration that result in motor and cognitive alterations. Voxel-based morphometry (VBM) analyses have found neurodegenerative patterns associated to SCA2, but they show some discrepancies. Moreover, behavioral deficits related to non-cerebellar functions are scarcely discussed in those reports. In this work we use behavioral and cognitive tests and VBM to identify and confirm cognitive and gray matter alterations in SCA2 patients compared with control subjects. Also, we discuss the cerebellar and non-cerebellar functions affected by this disease. Our results confirmed gray matter reduction in the cerebellar vermis, pons, and insular, frontal, parietal and temporal cortices. However, our analysis also found unreported loss of gray matter in the parahippocampal gyrus bilaterally. Motor performance test ratings correlated with total gray and white matter reductions, but executive performance and clinical features such as CAG repetitions and disease progression did not show any correlation. This pattern of cerebellar and non-cerebellar morphological alterations associated with SCA2 has to be considered to fully understand the motor and non-motor deficits that include language production and comprehension and some social skill changes that occur in these patients.


Assuntos
Encéfalo/patologia , Interpretação de Imagem Assistida por Computador , Imageamento por Ressonância Magnética , Ataxias Espinocerebelares/patologia , Ataxias Espinocerebelares/psicologia , Adulto , Cerebelo/patologia , Córtex Cerebral/patologia , Cognição , Feminino , Substância Cinzenta/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Atividade Motora , Ponte/patologia , Testes Psicológicos
17.
Nutrition ; 29(7-8): 1013-9, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23759261

RESUMO

OBJECTIVE: The aim of this study was to examine the brain activity manifested while non-small cell lung cancer (NSCLC) patients with and without anorexia were exposed to visual food stimuli. METHODS: We included 26 treatment-naïve patients who had been recently diagnosed with advanced NSCLC. Patients with brain metastasis were excluded. The patients were classified into anorectic and non-anorectic groups. Data from functional magnetic resonance imaging based on blood oxygen level-dependent (BOLD) signals were analyzed while the patients perceived pleasant and unpleasant food pictures. The brain records were analyzed with SPM 5 using a voxelwise multiple regression analysis. RESULTS: The non-anorexic patients demonstrated BOLD activation, comprising frontal brain regions in the premotor and the prefrontal cortices, only while watching unpleasant stimuli. The anorectic patients demonstrated no activation while watching the pleasant and unpleasant food pictures. CONCLUSIONS: Anorectic patients with lung cancer present a lack of activation in the brain regions associated with food stimuli processing. These results are consistent with experiences in the clinical environment: Patients describe themselves as not experiencing sensations of hunger or having an appetite.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/fisiopatologia , Emoções/fisiologia , Preferências Alimentares/fisiologia , Córtex Pré-Frontal/fisiopatologia , Adolescente , Adulto , Idoso , Anorexia/complicações , Anorexia/fisiopatologia , Apetite/fisiologia , Carcinoma Pulmonar de Células não Pequenas/complicações , Carcinoma Pulmonar de Células não Pequenas/diagnóstico , Feminino , Humanos , Fome/fisiologia , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Fenômenos Fisiológicos do Sistema Nervoso , Oxigênio/sangue , Estimulação Luminosa , Inquéritos e Questionários , Adulto Jovem
18.
Psychol Rep ; 111(2): 652-68, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23234107

RESUMO

Attention Deficit/Hyperactivity Disorder (ADHD) symptoms are manifested in social dynamics. In this study, the brain activity of eight child and adolescent patients diagnosed with ADHD was examined while they performed the Counting Stroop task and results were interpreted using social neuroscience premises. Brain activity was identified in frontal, parietal, and temporal regions related to the orienting system of attention and with linguistic, facial recognition, and mnemonic processes. Consistent with previous reports, these patients showed no activation in prefrontal and anterior cingulate cortices related to the executive system of attention. Also, they manifested activation in the insular cortex involving interoceptive processes that may be associated with impulsiveness. Global brain activity involves a network formed during early development and includes experiential components such as learning of rules, reward systems, empathy, and decision making. An integrative assessment of ADHD should consider psychosocial and neurobiological causes integrated into an individual's own experiences assembled throughout life.


Assuntos
Transtorno do Deficit de Atenção com Hiperatividade/fisiopatologia , Encéfalo/fisiopatologia , Adolescente , Criança , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Testes Neuropsicológicos , Neurociências/métodos , Percepção Social , Teste de Stroop
19.
Rev. Fac. Med. UNAM ; 55(4): 41-44, jul.-ago. 2012. ilus
Artigo em Espanhol | LILACS | ID: biblio-956925

RESUMO

Se presenta el caso de una mujer de 42 años de edad que inicia manifestaciones neurológicas caracterizadas por parestesias y hemiparesia corporal derecha. Con importante duda diagnóstica en su debut, pero la características de las lesiones (localización en corteza, ausencia en sustancia -lanca, falta de distribución arterial), serología positiva para LES y proteinuria, determino el diagnóstico de Lupus eritematoso Sistémico Neuropsiquiátrico (LENSP). El propósito de este manuscrito es informar la baja prevalencia (menor al 4%)¹ de esta manifestación y como representa un reto diagnóstico.


The case of a 42-year-old woman who presented neurologic symptoms characterized by paresthesias and right hemiparesis is presented here. Although the diagnosis was difficult at the beginning; yet, the features of the lesions (located in the cerebral cortex but not in the white matter; no arterial distribution), positive serology for SLE and proteinuria, determined the diagnosis of Neuropsychiatric systemic lupus erythematosus. The purpose of this work is to inform about the low prevalence (<4%) of the disease and how it is a diagnostic challenge.

20.
Brain Cogn ; 76(1): 5-14, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21492980

RESUMO

Compassion is considered a moral emotion related to the perception of suffering in others, and resulting in a motivation to alleviate the afflicted party. We compared brain correlates of compassion-evoking images in women and men. BOLD functional images of 24 healthy volunteers (twelve women and twelve men; age=27±2.5 y.o.) were acquired in a 3T magnetic resonance scanner while subjects viewed pictures of human suffering previously verified to elicit compassion and indicated their compassionate experience by finger movements. Functional analysis revealed that while women manifested activation in areas involved in basic emotional, empathic, and moral processes, such as basal regions and cingulate and frontal cortices, activation in men was restricted mainly to the occipital cortex and parahippocampal gyrus. These findings suggest that compassion and its moral elements constitute gender-relative subjective phenomena emerging from differently evolved neural mechanisms and socially learned features possibly related to nurturing skills.


Assuntos
Encéfalo/fisiologia , Emoções/fisiologia , Empatia , Caracteres Sexuais , Percepção Social , Estresse Psicológico , Adulto , Mapeamento Encefálico , Expressão Facial , Feminino , Humanos , Processamento de Imagem Assistida por Computador , Imageamento por Ressonância Magnética , Masculino , Estimulação Luminosa
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