Synaptic Nonlinearity
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Amplificação sináptica e interações não lineares na arborização dendrítica de modelos de motoneurônios / Synapti Amplication and Nonlinearities interations in the dendritics tree of motoneurons models
A partir de modelos de motoneurônios (MN) de geometria e estrutura complexa e capacidade de reproduzir as características de um motoneurônio real, este trabalho tem como objetivos verificar as diferenças funcionais entre sinapses proximais e distais, investigar as interações não lineares de ativações sinápticas e estudar a influência dos canais pe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/04/2010
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2. Amplificação sináptica e interações não lineares na arborização dendrítica de modelos de motoneurônios / Synapti Amplication and Nonlinearities interations in the dendritics tree of motoneurons models
A partir de modelos de motoneurônios (MN) de geometria e estrutura complexa e capacidade de reproduzir as características de um motoneurônio real, este trabalho tem como objetivos verificar as diferenças funcionais entre sinapses proximais e distais, investigar as interações não lineares de ativações sinápticas e estudar a influência dos canais pe
Publicado em: 2010
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3. 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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4. Gain control of firing rate by shunting inhibition: Roles of synaptic noise and dendritic saturation
Adjusting input–output gain is crucial for information processing by the brain. Gain control of subthreshold depolarization is commonly ascribed to increased membrane conductance caused by shunting inhibition. But contrary to its divisive effect on depolarization, shunting inhibition on its own fails to divisively modulate firing rate, apparently upsetting
The National Academy of Sciences.
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5. Subtraction inhibition combined with a spiking threshold accounts for cortical direction selectivity.
We have modeled simple-cell direction selectivity by a nonlinearity consisting of a subtraction inhibition followed by half-wave rectification and compared the performance of this model to that of different versions of the elaborated Reichardt detector for similar inputs and parameter settings. Not only does the subtraction model fit the experimental data mo
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6. Functional identification of the input-output transforms of motoneurones in the rat and cat.
1. We studied the responses of rat hypoglossal and cat lumbar motoneurones to a variety of excitatory and inhibitory injected current transients during repetitive discharge. The amplitudes and time courses of the transients were comparable to those of the synaptic currents underlying unitary and small compound postsynaptic potentials (PSPs) recorded in these