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Variability of spike firing during theta-coupled replay of memories in a simulated attractor network
KTH, Skolan för datavetenskap och kommunikation (CSC), Beräkningsbiologi, CB. (Lansner)
KTH, Skolan för datavetenskap och kommunikation (CSC), Beräkningsbiologi, CB. (Lansner)ORCID-id: 0000-0001-6553-823X
KTH, Skolan för datavetenskap och kommunikation (CSC), Beräkningsbiologi, CB. (Lansner)ORCID-id: 0000-0002-2358-7815
2012 (engelsk)Inngår i: Brain Research, ISSN 0006-8993, E-ISSN 1872-6240, Vol. 1434, s. 152-161Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Simulation work has recently shown that attractor networks can reproduce Poisson-like variability of single cell spiking, with coefficient of variation (Cv(2)) around unity, consistent with cortical data. However, the use of local variability (Lv) measures has revealed area- and layer-specific deviations from Poisson-like firing. In order to test these findings in silico we used a biophysically detailed attractor network model. We show that Lv well above 1, specifically found in superficial cortical layers and prefrontal areas, can indeed be reproduced in such networks and is consistent with periodic replay rather than persistent firing. The memory replay at the theta time scale provides a framework for a multi-item memory storage in the model. This article is part of a Special Issue entitled Neural Coding.

sted, utgiver, år, opplag, sider
2012. Vol. 1434, s. 152-161
Emneord [en]
Attractor model, Cortex, Oscillation, Spike statistics, Variability, Working memory
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-52763DOI: 10.1016/j.brainres.2011.07.055ISI: 000301559700015Scopus ID: 2-s2.0-84856624992OAI: oai:DiVA.org:kth-52763DiVA, id: diva2:467636
Forskningsfinansiär
EU, European Research CouncilSwedish e‐Science Research Center
Merknad

QC 20120416

Tilgjengelig fra: 2011-12-19 Laget: 2011-12-19 Sist oppdatert: 2018-01-12bibliografisk kontrollert

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