Reactivation in Working Memory: An Attractor Network Model of Free Recall

Lansner, AndersStockholms universitet,KTH,Beräkningsbiologi, CB,Numerisk analys och datalogi (NADA),Royal Institute of Technology, Sweden (författare)

Reactivation in Working Memory : An Attractor Network Model of Free Recall

QC 20131002
AuthorCount:4;
The dynamic nature of human working memory, the general-purpose system for processing continuous input, while keeping no longer externally available information active in the background, is well captured in immediate free recall of supraspan word-lists. Free recall tasks produce several benchmark memory phenomena, like the U-shaped serial position curve, reflecting enhanced memory for early and late list items. To account for empirical data, including primacy and recency as well as contiguity effects, we propose here a neurobiologically based neural network model that unifies short- and long-term forms of memory and challenges both the standard view of working memory as persistent activity and dual-store accounts of free recall. Rapidly expressed and volatile synaptic plasticity, modulated intrinsic excitability, and spike-frequency adaptation are suggested as key cellular mechanisms underlying working memory encoding, reactivation and recall. Recent findings on the synaptic and molecular mechanisms behind early LTP and on spiking activity during delayed-match-to-sample tasks support this view.

Marklund, PetterStockholms universitet,Psykologiska institutionen(Swepub:su)pmark (författare)
Sikström, SverkerLund University,Lunds universitet,Kognitionsvetenskap,Filosofiska institutionen,Institutioner,Humanistiska och teologiska fakulteterna,Cognitive Science,Department of Philosophy,Departments,Joint Faculties of Humanities and Theology(Swepub:lu)lucs-ssi (författare)
Nilsson, Lars-GöranStockholms universitet,Psykologiska institutionen(Swepub:su)lgn (författare)
KTHBeräkningsbiologi, CB (creator_code:org_t)

Av författaren/redakt...: Lansner, Anders; Marklund, Petter; Sikström, Sverke ...; Nilsson, Lars-Gö ...

Om ämnet

Av lärosätet: Kungliga Tekniska Högskolan; Lunds universitet; Stockholms universitet

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