Base de dados : MEDLINE
Pesquisa : F02.463 [Categoria DeCS]
Referências encontradas : 10826 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 1083 ir para página                         

  1 / 10826 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29238085
[Au] Autor:Avena-Koenigsberger A; Misic B; Sporns O
[Ad] Endereço:Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana 47405, USA.
[Ti] Título:Communication dynamics in complex brain networks.
[So] Source:Nat Rev Neurosci;19(1):17-33, 2017 Dec 14.
[Is] ISSN:1471-0048
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Neuronal signalling and communication underpin virtually all aspects of brain activity and function. Network science approaches to modelling and analysing the dynamics of communication on networks have proved useful for simulating functional brain connectivity and predicting emergent network states. This Review surveys important aspects of communication dynamics in brain networks. We begin by sketching a conceptual framework that views communication dynamics as a necessary link between the empirical domains of structural and functional connectivity. We then consider how different local and global topological attributes of structural networks support potential patterns of network communication, and how the interactions between network topology and dynamic models can provide additional insights and constraints. We end by proposing that communication dynamics may act as potential generative models of effective connectivity and can offer insight into the mechanisms by which brain networks transform and process information.
[Mh] Termos MeSH primário: Encéfalo/fisiologia
Processos Mentais/fisiologia
Vias Neurais/fisiologia
[Mh] Termos MeSH secundário: Encéfalo/anatomia & histologia
Encéfalo/citologia
Seres Humanos
Modelos Neurológicos
Vias Neurais/anatomia & histologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171225
[Lr] Data última revisão:
171225
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171215
[St] Status:MEDLINE
[do] DOI:10.1038/nrn.2017.149


  2 / 10826 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29184197
[Au] Autor:Parthasarathy A; Herikstad R; Bong JH; Medina FS; Libedinsky C; Yen SC
[Ad] Endereço:NUS Graduate School of Integrative Science and Engineering, National University of Singapore (NUS), Singapore, Singapore.
[Ti] Título:Mixed selectivity morphs population codes in prefrontal cortex.
[So] Source:Nat Neurosci;20(12):1770-1779, 2017 Dec.
[Is] ISSN:1546-1726
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The prefrontal cortex maintains working memory information in the presence of distracting stimuli. It has long been thought that sustained activity in individual neurons or groups of neurons was responsible for maintaining information in the form of a persistent, stable code. Here we show that, upon the presentation of a distractor, information in the lateral prefrontal cortex was reorganized into a different pattern of activity to create a morphed stable code without losing information. In contrast, the code in the frontal eye fields persisted across different delay periods but exhibited substantial instability and information loss after the presentation of a distractor. We found that neurons with mixed-selective responses were necessary and sufficient for the morphing of code and that these neurons were more abundant in the lateral prefrontal cortex than the frontal eye fields. This suggests that mixed selectivity provides populations with code-morphing capability, a property that may underlie cognitive flexibility.
[Mh] Termos MeSH primário: Processos Mentais/fisiologia
Córtex Pré-Frontal/fisiologia
[Mh] Termos MeSH secundário: Animais
Lateralidade Funcional/fisiologia
Macaca fascicularis
Memória de Curto Prazo/fisiologia
Neurônios/fisiologia
Técnicas de Patch-Clamp
Córtex Pré-Frontal/citologia
Desempenho Psicomotor/fisiologia
Movimentos Sacádicos
Campos Visuais/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171212
[Lr] Data última revisão:
171212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171130
[St] Status:MEDLINE
[do] DOI:10.1038/s41593-017-0003-2


  3 / 10826 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29079277
[Au] Autor:Modi HN; Singh H; Yang GZ; Darzi A; Leff DR
[Ad] Endereço:Department of Surgery and Cancer, Imperial College London, London, United Kingdom.
[Ti] Título:A decade of imaging surgeons' brain function (part II): A systematic review of applications for technical and nontechnical skills assessment.
[So] Source:Surgery;162(5):1130-1139, 2017 Nov.
[Is] ISSN:1532-7361
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Functional neuroimaging technologies enable assessment of operator brain function and can deepen our understanding of skills learning, ergonomic optima, and cognitive processes in surgeons. Although there has been a critical mass of data detailing surgeons' brain function, this literature has not been reviewed systematically. METHODS: A systematic search of original neuroimaging studies assessing surgeons' brain function and published up until November 2016 was conducted using Medline, Embase, and PsycINFO databases. RESULTS: Twenty-seven studies fulfilled the inclusion criteria, including 3 feasibility studies, 14 studies exploring the neural correlates of technical skill acquisition, and the remainder investigating brain function in the context of intraoperative decision-making (n = 1), neurofeedback training (n = 1), robot-assisted technology (n = 5), and surgical teaching (n = 3). Early stages of learning open surgical tasks (knot-tying) are characterized by prefrontal cortical activation, which subsequently attenuates with deliberate practice. However, with complex laparoscopic skills (intracorporeal suturing), prefrontal cortical engagement requires substantial training, and attenuation occurs over a longer time course, after years of refinement. Neurofeedback and interventions that improve neural efficiency may enhance technical performance and skills learning. CONCLUSION: Imaging surgeons' brain function has identified neural signatures of expertise that might help inform objective assessment and selection processes. Interventions that improve neural efficiency may target skill-specific brain regions and augment surgical performance.
[Mh] Termos MeSH primário: Encéfalo/diagnóstico por imagem
Competência Clínica
Cognição/fisiologia
Aprendizagem/fisiologia
Cirurgiões/psicologia
Procedimentos Cirúrgicos Operatórios/psicologia
[Mh] Termos MeSH secundário: Encéfalo/metabolismo
Encéfalo/fisiologia
Circulação Cerebrovascular/fisiologia
Avaliação Educacional
Cirurgia Geral/normas
Hemodinâmica
Seres Humanos
Processos Mentais/fisiologia
Neuroimagem
Plasticidade Neuronal/fisiologia
Neurônios/fisiologia
Procedimentos Cirúrgicos Operatórios/educação
Análise e Desempenho de Tarefas
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171109
[Lr] Data última revisão:
171109
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:171029
[St] Status:MEDLINE


  4 / 10826 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28898244
[Au] Autor:Al-Barrak L; Kanjo E; Younis EMG
[Ad] Endereço:Bristol University, Computing Department, Bristol, United Kingdom.
[Ti] Título:NeuroPlace: Categorizing urban places according to mental states.
[So] Source:PLoS One;12(9):e0183890, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Urban spaces have a great impact on how people's emotion and behaviour. There are number of factors that impact our brain responses to a space. This paper presents a novel urban place recommendation approach, that is based on modelling in-situ EEG data. The research investigations leverages on newly affordable Electroencephalogram (EEG) headsets, which has the capability to sense mental states such as meditation and attention levels. These emerging devices have been utilized in understanding how human brains are affected by the surrounding built environments and natural spaces. In this paper, mobile EEG headsets have been used to detect mental states at different types of urban places. By analysing and modelling brain activity data, we were able to classify three different places according to the mental state signature of the users, and create an association map to guide and recommend people to therapeutic places that lessen brain fatigue and increase mental rejuvenation. Our mental states classifier has achieved accuracy of (%90.8). NeuroPlace breaks new ground not only as a mobile ubiquitous brain monitoring system for urban computing, but also as a system that can advise urban planners on the impact of specific urban planning policies and structures. We present and discuss the challenges in making our initial prototype more practical, robust, and reliable as part of our on-going research. In addition, we present some enabling applications using the proposed architecture.
[Mh] Termos MeSH primário: Encéfalo/fisiologia
Eletroencefalografia
Processos Mentais
População Urbana
[Mh] Termos MeSH secundário: Adolescente
Adulto
Algoritmos
Análise de Variância
Ondas Encefálicas
Planejamento de Cidades
Eletroencefalografia/métodos
Meio Ambiente
Feminino
Seres Humanos
Modelos Estatísticos
Distribuição Espacial da População
Estresse Psicológico
Tecnologia sem Fio
Adulto Jovem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171018
[Lr] Data última revisão:
171018
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170913
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0183890


  5 / 10826 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28839066
[Au] Autor:Michaels R
[Ad] Endereço:RAM TRAC Corporation, Schenectady, NY 12309, USA. ram@ramtrac.com.
[Ti] Título:Confidence in courts: A delicate balance.
[So] Source:Science;357(6353):764, 2017 08 25.
[Is] ISSN:1095-9203
[Cp] País de publicação:United States
[La] Idioma:eng
[Mh] Termos MeSH primário: Direito Penal
Processos Mentais
[Mh] Termos MeSH secundário: Seres Humanos
[Pt] Tipo de publicação:LETTER; COMMENT
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171024
[Lr] Data última revisão:
171024
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170826
[St] Status:MEDLINE
[do] DOI:10.1126/science.aao3967


  6 / 10826 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28807409
[Au] Autor:Modi HN; Singh H; Yang GZ; Darzi A; Leff DR
[Ad] Endereço:Department of Surgery and Cancer, Imperial College London, London, United Kingdom.
[Ti] Título:A decade of imaging surgeons' brain function (part I): Terminology, techniques, and clinical translation.
[So] Source:Surgery;162(5):1121-1130, 2017 Nov.
[Is] ISSN:1532-7361
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Functional neuroimaging has the potential to deepen our understanding of technical and nontechnical skill acquisition in surgeons, particularly as established assessment tools leave unanswered questions about inter-operator differences in ability that seem independent of experience. METHODS: In this first of a 2-part article, we aim to utilize our experience in neuroimaging surgeons to orientate the nonspecialist reader to the principles of brain imaging. Terminology commonly used in brain imaging research is explained, placing emphasis on the "activation response" to an surgical task and its effect on local cortical hemodynamic parameters (neurovascular coupling). RESULTS: Skills learning and subsequent consolidation and refinement through practice lead to reorganization of the functional architecture of the brain (known as "neuroplasticity"), evidenced by changes in the strength of regional activation as well as alterations in connectivity between brain regions, culminating in more efficient use of neural resources during task performance. CONCLUSION: Currently available neuroimaging techniques that either directly (ie, measure electrical activity) or indirectly (ie, measure tissue hemodynamics) assess brain function are discussed. Finally, we highlight the important practical considerations when conducting brain imaging research in surgeons.
[Mh] Termos MeSH primário: Encéfalo/diagnóstico por imagem
Competência Clínica
Cognição/fisiologia
Aprendizagem/fisiologia
Cirurgiões/psicologia
Procedimentos Cirúrgicos Operatórios/psicologia
[Mh] Termos MeSH secundário: Encéfalo/metabolismo
Encéfalo/fisiologia
Circulação Cerebrovascular/fisiologia
Hemodinâmica
Seres Humanos
Processos Mentais/fisiologia
Neuroimagem
Plasticidade Neuronal/fisiologia
Neurônios/fisiologia
Procedimentos Cirúrgicos Operatórios/educação
Análise e Desempenho de Tarefas
Terminologia como Assunto
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171109
[Lr] Data última revisão:
171109
[Sb] Subgrupo de revista:AIM; IM
[Da] Data de entrada para processamento:170816
[St] Status:MEDLINE


  7 / 10826 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28618454
[Au] Autor:Ginot E
[Ad] Endereço:Private Practice, New York, New York.
[Ti] Título:The enacted unconscious: a neuropsychological model of unconscious processes.
[So] Source:Ann N Y Acad Sci;1406(1):71-76, 2017 Oct.
[Is] ISSN:1749-6632
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Integrating neuropsychology with psychoanalytic thinking and experience, this paper offers a new view of the unconscious that veers away from more traditional conceptualizations. Rather, it emphasizes the ever-present influence of ongoing unconscious processes on much of our behaviors and mental states. Importantly, this new understanding is based on the functional unity of the brain/mind.
[Mh] Termos MeSH primário: Encéfalo/fisiologia
Processos Mentais/fisiologia
Neuropsicologia/métodos
Inconsciente (Psicologia)
[Mh] Termos MeSH secundário: Terapia Cognitiva/métodos
Terapia Cognitiva/tendências
Seres Humanos
Neuropsicologia/tendências
Pensamento/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171027
[Lr] Data última revisão:
171027
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170616
[St] Status:MEDLINE
[do] DOI:10.1111/nyas.13404


  8 / 10826 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28595052
[Au] Autor:Deco G; Kringelbach ML
[Ad] Endereço:Center for Brain and Cognition, Computational Neuroscience Group, Department of Information and Communication Technologies, Universitat Pompeu Fabra, Roc Boronat 138, Barcelona 08018, Spain; Institució Catalana de la Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys 23, Barcelona 08010, Spain; Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, 04103 Leipzig, Germany; School of Psychological Sciences, Monash University, Melbourne, Clayton VIC 3800, Australia.
[Ti] Título:Hierarchy of Information Processing in the Brain: A Novel 'Intrinsic Ignition' Framework.
[So] Source:Neuron;94(5):961-968, 2017 Jun 07.
[Is] ISSN:1097-4199
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:A general theory of brain function has to be able to explain local and non-local network computations over space and time. We propose a new framework to capture the key principles of how local activity influences global computation, i.e., describing the propagation of information and thus the broadness of communication driven by local activity. More specifically, we consider the diversity in space (nodes or brain regions) over time using the concept of intrinsic ignition, which are naturally occurring intrinsic perturbations reflecting the capability of a given brain area to propagate neuronal activity to other regions in a given brain state. Characterizing the profile of intrinsic ignition for a given brain state provides insight into the precise nature of hierarchical information processing. Combining this data-driven method with a causal whole-brain computational model can provide novel insights into the imbalance of brain states found in neuropsychiatric disorders.
[Mh] Termos MeSH primário: Encéfalo/fisiologia
Processos Mentais/fisiologia
Modelos Neurológicos
[Mh] Termos MeSH secundário: Seres Humanos
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170726
[Lr] Data última revisão:
170726
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170609
[St] Status:MEDLINE


  9 / 10826 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28586668
[Au] Autor:Mongillo G; Loewenstein Y
[Ad] Endereço:Centre National de la Recherche Scientifique (CNRS), Paris, France and Centre de Neurophysique, Physiologie et Pathologie (CNPP), Universite Descartes, Paris, France.
[Ti] Título:Neuroscience: Formation of a Percept in the Rat Cortex.
[So] Source:Curr Biol;27(11):R423-R425, 2017 Jun 05.
[Is] ISSN:1879-0445
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:It has long been known that we subjectively experience longer stimuli as being more intense. A recent study sheds light on the neural mechanisms underlying this bias by tracking the formation of a percept of intensity in the rat brain.
[Mh] Termos MeSH primário: Encéfalo/fisiologia
Córtex Cerebral/fisiologia
Percepção Visual/fisiologia
[Mh] Termos MeSH secundário: Animais
Processos Mentais
Neurociências
Estimulação Luminosa/métodos
Ratos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171109
[Lr] Data última revisão:
171109
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170607
[St] Status:MEDLINE


  10 / 10826 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28570661
[Au] Autor:Wollstadt P; Sellers KK; Rudelt L; Priesemann V; Hutt A; Fröhlich F; Wibral M
[Ad] Endereço:MEG Unit, Brain Imaging Center, Goethe University, Frankfurt/Main, Germany.
[Ti] Título:Breakdown of local information processing may underlie isoflurane anesthesia effects.
[So] Source:PLoS Comput Biol;13(6):e1005511, 2017 Jun.
[Is] ISSN:1553-7358
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The disruption of coupling between brain areas has been suggested as the mechanism underlying loss of consciousness in anesthesia. This hypothesis has been tested previously by measuring the information transfer between brain areas, and by taking reduced information transfer as a proxy for decoupling. Yet, information transfer is a function of the amount of information available in the information source-such that transfer decreases even for unchanged coupling when less source information is available. Therefore, we reconsidered past interpretations of reduced information transfer as a sign of decoupling, and asked whether impaired local information processing leads to a loss of information transfer. An important prediction of this alternative hypothesis is that changes in locally available information (signal entropy) should be at least as pronounced as changes in information transfer. We tested this prediction by recording local field potentials in two ferrets after administration of isoflurane in concentrations of 0.0%, 0.5%, and 1.0%. We found strong decreases in the source entropy under isoflurane in area V1 and the prefrontal cortex (PFC)-as predicted by our alternative hypothesis. The decrease in source entropy was stronger in PFC compared to V1. Information transfer between V1 and PFC was reduced bidirectionally, but with a stronger decrease from PFC to V1. This links the stronger decrease in information transfer to the stronger decrease in source entropy-suggesting reduced source entropy reduces information transfer. This conclusion fits the observation that the synaptic targets of isoflurane are located in local cortical circuits rather than on the synapses formed by interareal axonal projections. Thus, changes in information transfer under isoflurane seem to be a consequence of changes in local processing more than of decoupling between brain areas. We suggest that source entropy changes must be considered whenever interpreting changes in information transfer as decoupling.
[Mh] Termos MeSH primário: Anestésicos Inalatórios/farmacologia
Estado de Consciência
Isoflurano/farmacologia
Processos Mentais/efeitos dos fármacos
Inconsciência
[Mh] Termos MeSH secundário: Anestesia
Animais
Estado de Consciência/efeitos dos fármacos
Estado de Consciência/fisiologia
Feminino
Furões
Córtex Pré-Frontal/efeitos dos fármacos
Inconsciência/induzido quimicamente
Inconsciência/fisiopatologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Anesthetics, Inhalation); CYS9AKD70P (Isoflurane)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170627
[Lr] Data última revisão:
170627
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170602
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pcbi.1005511



página 1 de 1083 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde