BibTeX
@MISC{Arecchi_complexityof,
author = {F. Tito Arecchi},
title = {COMPLEXITY OF PERCEPTUAL PROCESSES},
year = {}
}
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Abstract
At the borderline between neuroscience and physics of complex phenomena, a new paradigm is under investigation,namely feature binding. This terminology denotes how a large collection of coupled neurons combines external signals with internal memories into new coherent patterns of meaning. An external stimulus spreads over an assembly of coupled neurons, building up a corresponding collective state. Thus, the synchronization of spike trains of many individual neurons is the basis of a coherent perception. Based on recent investigations, a novel conjecture for the dynamics of single neurons and, consequently, for neuron assemblies has been formulated. Homoclinic chaos is proposed as the most suitable way to code information in time by trains of equal spikes occurring at apparently erratic times; a new quantitative indicator, called propensity,is introduced to select the most appropriate neuron model. In order to classify the set of different perceptions, the percept space is given a metric structure by introducing a distance measure between distinct percepts. The distance in percept space is conjugate to the duration of the perception in the sense that an uncertainty relation in percept space is associated with time limited perceptions. Thus coding of different percepts by synchronized spike trains entails fundamental quantum features. It is conjectured that they are related to the details of the perceptual chain rather than depending on
Keyphrases
percept space complexity perceptual process spike train appropriate neuron model corresponding collective state uncertainty relation recent investigation equal spike coupled neuron suitable way homoclinic chaos metric structure different perception many individual neuron new coherent pattern coupled neuron combine external signal new paradigm complex phenomenon coherent perception new quantitative indicator fundamental quantum feature neuron assembly distance measure feature binding large collection distinct percept single neuron perceptual chain novel conjecture different percept external stimulus spread erratic time time limited perception internal memory
