Cortical Networks
Mostrando 1-12 de 57 artigos, teses e dissertações.
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1. Transcranial magnetic stimulation of the medial prefrontal cortex for psychiatric disorders: a systematic review
Objective: The medial prefrontal cortex (mPFC) is a highly connected cortical region that acts as a hub in major large-scale brain networks. Its dysfunction is associated with a number of psychiatric disorders, such as schizophrenia, autism, depression, substance use disorder (SUD), obsessive-compulsive disorder (OCD), and anxiety disorders. Repetitive tran
Braz. J. Psychiatry. Publicado em: 30/05/2019
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2. Emprego de redes complexas no estudo das relações entre morfologia individual, topologia global e aspectos dinâmicos em neurociência / Employment of complex network theory on the study of the relations between individual morphology, global topology and dynamical aspects in Neuroscience
A teoria de redes complexas se consolidou nos últimos anos, graças ao seu potencial como ferramenta versátil no estudo de diversos sistemas discretos. É possível enumerar aplicações em áreas tão distintas como engenharia, sociologia, computação, linguística e biologia. Tem merecido atenção, por exemplo, o estudo da organização estrutural do c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/05/2012
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3. A relação entre estrutura e função em redes complexas observada localmente / The relationship between structure and function in complex networks observed locally
O estudo de redes complexas tem despertado muita atenção nos últimos anos, principalmente pela sua capacidade de permitir a análise dos mais diversificados sistemas através de um mesmo conjunto de ferramentas matemáticas e computacionais. Até pouco tempo a ênfase nessa área era sobre o estudo das propriedades estruturas e sua influência em caracter
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/02/2012
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4. Defense-related emotions in humans
The study of the role of serotonin in anxiety has led to the view that this neurotransmitter enhances anxiety, but inhibits panic. Validation of this hypothesis has been made using two experimental procedures that increase anxiety in human volunteers. One is classical conditioning of the skin electrical conductance response, which is assumed to represent anx
Psychology & Neuroscience. Publicado em: 2011
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5. Modelação do processamento neuronal primário no sistema visual de mamíferos. / Modelling the primary neural processing in mammal s visual system.
Since the discovery of the receptive field properties of cortical neurons in the primary visual cortex, their organization has been studied with many methods ranging from electrophysiology and optical imaging to computational neuroscience. Few models have been capable of showing ocularity and orientation selectivity simultaneously. A large-scale computationa
Publicado em: 2001
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6. Timing of neural responses in cortical organotypic slices
Timing is a fundamental part of sensory and motor processing. However, little is known about the neural mechanisms underlying timing in the range of tens to hundreds of milliseconds. Although many theoretical hypotheses have been put forth on the possible underpinnings of temporal processing, there is little cellular experimental data, particularly in vitro,
The National Academy of Sciences.
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7. Computational subunits of visual cortical neurons revealed by artificial neural networks
A crucial step toward understanding visual processing is to obtain a comprehensive description of the relationship between visual stimuli and neuronal responses. Many neurons in the visual cortex exhibit nonlinear responses, making it difficult to characterize their stimulus–response relationships. Here, we recorded the responses of primary visual cortical
National Academy of Sciences.
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8. Stability of muscle synergies for voluntary actions after cortical stroke in humans
Production of voluntary movements relies critically on the functional integration of several motor cortical areas, such as the primary motor cortex, and the spinal circuitries. Surprisingly, after almost 40 years of research, how the motor cortices specify descending neural signals destined for the downstream interneurons and motoneurons has remained elusive
National Academy of Sciences.
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9. Leading role of thalamic over cortical neurons during postinhibitory rebound excitation
The postinhibitory rebound excitation is an intrinsic property of thalamic and cortical neurons that is implicated in a variety of normal and abnormal operations of neuronal networks, such as slow or fast brain rhythms during different states of vigilance as well as seizures. We used dual simultaneous intracellular recordings of thalamocortical neurons from
The National Academy of Sciences.
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10. Lentivirus-based genetic manipulations of cortical neurons and their optical and electrophysiological monitoring in vivo
It is becoming increasingly clear that single cortical neurons encode complex and behaviorally relevant signals, but efficient means to study gene functions in small networks and single neurons in vivo are still lacking. Here, we establish a method for genetic manipulation and subsequent phenotypic analysis of individual cortical neurons in vivo. First, lent
National Academy of Sciences.
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11. Visuo-tactile cross-modal associations in cortical somatosensory cells
Recent studies show that cells in the somatosensory cortex are involved in the short-term retention of tactile information. In addition, some somatosensory cells appear to retain visual information that has been associated with the touch of an object. The presence of such cells suggests that nontactile stimuli associated with touch have access to cortical ne
The National Academy of Sciences.
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12. Model of cortical organization embodying a basis for a theory of information processing and memory recall.
Motivated by V. B. Mountcastle's organizational principle for neocortical function, and by M. E. Fisher's model of physical spin systems, we introduce a cooperative model of the cortical column incorporating an idealized substructure, the trion, which represents a localized group of neurons. Computer studies reveal that typical networks composed of a small n