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Seminars & Lectures

* TITLE

Reverse of firing causality by synchronous neural activity

* SPEAKERS

Name	Affiliation	E-mail
Dr. Myoung Won Cho	SNU	mwcho(at)snu.ac.kr

* HOST(Applicant)

Name	Affiliation	E-mail
-

* DATE / TIME

2007-04-10, 3:00 p.m.

* PLACE

APCTP Headquarters seminar room, Pohang

* ABSTRACT

It is commonly believed that spike timings of a postsynaptic neuron tend
to follow those of the presynaptic neuron. Such orthodromic firing may,
however, cause a conflict with the functional integrity of the
geometrically
complex dendritic tree due to asymmetric temporal Hebbian plasticity.
We argue that reversed spike timings in a synapse are a typical phenomenon
in the cortex, which has a stabilizing effect onto the dendritic
structures.
We demonstrate how the firing causality in a synapse is perturbed by
synchronous neural activity, and how the equilibrium properties of
spike-timing dependent plasticity in a network is determined principally by
the degree of synchronization.We find that even noise-induced activity and
synchrony of neurons can result in an equalization of synaptic efficacy.

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