Banca de QUALIFICAÇÃO: DANIEL GARCIA TEIXEIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : DANIEL GARCIA TEIXEIRA
DATA : 23/02/2018
HORA: 14:30
LOCAL: BioME
TÍTULO:

A role for feedforward inhibition in regulating gamma-frequency oscillation induced by feedback inhibition

PALAVRAS-CHAVES:

Computational  modeling.  Gamma  oscillation.  Neuron.  Inhibition. Feedfoward.

PÁGINAS: 53
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Ciência da Computação
RESUMO:

Gamma oscillation is present in several areas of the brain, such as the hippocampus, playing an important mechanism for memory functioning. We found several models capable of explaining the  generation  of  the  gamma  oscillations  and  explain  their  two  functionalities,  that  of synchronously  grouping  the  synapses  of  the  neurons  and  of  selecting  which  neurons  must trigger  in  each  cycle  of  this  synchronism.  These  functionalities  impart  a  computational character  of  neural  processing  to  this  system,  such  as  the  separation  of  patterns  and  the formation of neural assemblies. However, the analysis of these existent models shows to be very sensitive to the variations of the cerebral activities, being strongly affected by variations and their layers of entrance, in order to appear not to have a good robustness, generating much variation of their frequency of exit, as in between these neurons. However, when considering an important part of the biological circuit not considered in previous studies, a fed-in inhibition network enabled us to create a new model. Based on the Izhikevich neuron model, we generated a new model with greater robustness to the variations in the input layer, as well as a reduced computational cost and proximity of the biological model. In the possession of this new model, it will be possible to create neural networks with greater capacity of neurons, with reduced computational cost, besides the possibility of analyzing the individual behavior in each neuron of the model.

MEMBROS DA BANCA:
Presidente - 2276280 - CESAR RENNO COSTA
Externo à Instituição - RENAN CIPRIANO MOIOLI - IINN
Interno - 1507794 - RODRIGO JULIANI SIQUEIRA DALMOLIN