Pyramidal Neuron
Mostrando 1-12 de 61 artigos, teses e dissertações.
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1. Alterações da morfologia dendrítica e epilepsia: uma abordagem neurocomputacional / Dendritic Morphology Alterations and Epilepsy: A Neurocomputational Approach.
Pesquisas in vivo e in vitro, têm estabelecido uma correlação entre alterações na morfologia dendrítica e a epilepsia. No entanto, ainda não se conhecem em detalhe as consequências dessas modificações, sobre a eletrofisiologia e o padrão de disparo. Também existe um fenômeno que não tem sido completamente explicado, conhecido como o paradoxo do
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2012
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2. Efeitos da restrição proteica gestacional em hipocampo de ratos machos adultos : avaliação da estrutura dendrítica tridimensional, do comportamento e de componentes neuroquímicos = Effects of gestational protein restriction in hippocampus of adult male rats / Effects of gestational protein restriction in hippocampus of adult male rats : evaluation of three-dimensional dendritic structure of hippocampal neurons, behavior and neurochemical components
Studies have demonstrated that maternal nutritional restriction during pregnancy or in early postnatal life results in hippocampus cognitive impairment and structural abnormalities in the 16-wk-old offspring. In an attempt to analyze whether gestational protein restriction might induce learning and memory impairment associated with structural changes in the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/07/2012
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3. Shy-Drager Syndrome : a functional protocol study of the Autonomic Nervous System in 3 cases / Sindrome de Shy-Drager : protocolo de estudo funcional do sistema nervoso autonomo em 3 casos clinicos
This study was motivated by the desire to better understand the autonomic functions in subjects clinically diagnosed as Shy-Drager syndrome. This syndrome was selected because it presents a disorder in the central autonomic structures of CNS. This degenerative disease represents a multiple disorders of CNS which include dysautonomia associated with pyramidal
Publicado em: 1984
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4. Dementia of frontal lobe type and motor neuron disease. A Golgi study of the frontal cortex.
Neuropathological findings in a 38 year old patient with dementia of frontal lobe type and motor neuron disease included pyramidal tracts, myelin pallor and neuron loss, gliosis and chromatolysis in the hypoglossal nucleus, together with frontal atrophy, neuron loss, gliosis and spongiosis in the upper cortical layers of the frontal (and temporal) lobes. Mos
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5. Differential signaling via the same axon of neocortical pyramidal neurons
The nature of information stemming from a single neuron and conveyed simultaneously to several hundred target neurons is not known. Triple and quadruple neuron recordings revealed that each synaptic connection established by neocortical pyramidal neurons is potentially unique. Specifically, synaptic connections onto the same morphological class differed in t
The National Academy of Sciences.
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6. Laminar origins of inhibitory synaptic inputs to pyramidal neurons of the rat neocortex.
1. Inhibitory neuron-pyramidal cell interactions were investigated in slices of rat somatosensory cortex in which excitatory synaptic transmission was blocked with bath-applied glutamate receptor antagonists. Local inhibitory neurons were excited by focal pressure ejections of small (approximately 40 pl) volumes of 1-10 mM acetylcholine. 2. The frequency of
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7. Calcium electrogenesis in distal apical dendrites of layer 5 pyramidal cells at a critical frequency of back-propagating action potentials
Action potentials in juvenile and adult rat layer-5 neocortical pyramidal neurons can be initiated at both axonal and distal sites of the apical dendrite. However, little is known about the interaction between these two initiation sites. Here, we report that layer 5 pyramidal neurons are very sensitive to a critical frequency of back-propagating action poten
The National Academy of Sciences.
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8. The Electrotonic Structure of Pyramidal Neurons Contributing to Prefrontal Cortical Circuits in Macaque Monkeys Is Significantly Altered in Aging
Whereas neuronal numbers are largely preserved in normal aging, subtle morphological changes occur in dendrites and spines, whose electrotonic consequences remain unexplored. We examined age-related morphological alterations in 2 types of pyramidal neurons contributing to working memory circuits in the macaque prefrontal cortex (PFC): neurons in the superior
Oxford University Press.
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9. Dynamics of a minimal neural model consisting of an astrocyte, a neuron, and an interneuron
In this paper, a biophysical neural network model consisting of a pyramidal neuron, an interneuron, and the astrocyte is studied. The corresponding dynamical properties are mainly investigated by using numerical simulations. The results show that the presence of the adenosine triphosphate and of the interneuron impacts the overall neural activity. It is show
Springer Netherlands.
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10. Active summation of excitatory postsynaptic potentials in hippocampal CA3 pyramidal neurons
The manner in which the thousands of synaptic inputs received by a pyramidal neuron are summed is critical both to our understanding of the computations that may be performed by single neurons and of the codes used by neurons to transmit information. Recent work on pyramidal cell dendrites has shown that subthreshold synaptic inputs are modulated by voltage-
The National Academy of Sciences.
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11. Dopamine synaptic complex with pyramidal neurons in primate cerebral cortex.
Dopamine (DA)-containing projections to the cerebral cortex are considered to play an important role in cognitive processes. Using a recently developed monoclonal antiserum directed against DA and an antibody directed against tyrosine hydroxylase in combination with Golgi impregnation and electron microscopy, we have observed that DA and tyrosine hydroxylase
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12. The neural code between neocortical pyramidal neurons depends on neurotransmitter release probability
Although signaling between neurons is central to the functioning of the brain, we still do not understand how the code used in signaling depends on the properties of synaptic transmission. Theoretical analysis combined with patch clamp recordings from pairs of neocortical pyramidal neurons revealed that the rate of synaptic depression, which depends on the p
The National Academy of Sciences of the USA.