题名

Functional Interactions in Hierarchically Organized Neural Networks Studied with Spatiotemporal Firing Patterns and Phase-Coupling Frequencies

DOI

10.4077/CJP.2010.AMM039

作者

Stephen Perrig;Javier Iglesias;Vladislav Shaposhnyk;Olga Chibirova;Pierre Dutoit;Jérémie Cabessa;Katerina Espa-Cervena;Laurent Pelletier;François Berger;Alessandro E.P. Villa

关键词

apoptosis ; spike timing dependent plasticity ; synaptic pruning ; preferred firing sequence ; insomnia ; EEG

期刊名称

The Chinese Journal of Physiology

卷期/出版年月

53卷6期(2010 / 12 / 01)

页次

382 - 395

内容语文

英文

英文摘要

A scalable hardware/software hybrid module-called Ubidule-endowed with bio-inspired ontogenetic and epigenetic features is configured to run a neural networks simulation with developmental and evolvable capabilities. We simulated the activity of hierarchically organized spiking neural networks characterized by an initial developmental phase featuring cell death followed by spike timing dependent synaptic plasticity in presence of background noise. An upstream 'sensory' network received a spatiotemporally organized external input and downstream networks were activated only via the upstream network. Precise firing sequences, formed by recurrent patterns of spikes intervals above chance levels, were observed in all recording conditions, thus suggesting the build-up of a connectivity able to sustain temporal information processing. The activity of a Ubinet-a network of Ubidules-is analyzed by means of virtual electrodes that recorded neural signals similar to EEG. The analysis of these signals was compared with a small set of human recordings and revealed common patterns of shift in quadratic phase coupling. The results suggest some interpretations of changes and plasticity of functional interactions between cortical areas driven by external stimuli and by learning/cognitive paradigms.

主题分类 醫藥衛生 > 基礎醫學
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