Visual antipriming: evidence for ongoing adjustments of superimposed visual object representations.

Full Abstract

A fundamental question of memory is whether the representations of different items are stored in localist/discrete or superimposed/overlapping manners. Neural evidence suggests that neocortical areas underlying visual object identification utilizesuperimposed representations that undergo continual adjustments, but there has been little corroborating behavioral evidence. We hypothesize that the representation of an object is strengthened, after it is identified, via small representational changes; this strengthening is responsible for repetition priming for that object, but it should also be responsible for antipriming of other objects that have representations superimposed with that of the primed object. Functional evidence for antipriming is reported in young adults, amnesic patients, and matched control participants, and neurocomputational models. The findings from patients dismiss explicit memory explanations, and the models fit the behavioral performance exceptionally well. Putative purposes of priming and comparisons with other theories are discussed. Priming and antipriming may reflect ongoing adjustments of superimposed representations in neocortex.

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Author information

Author/s: Marsolek, Chad J (CJ); Schnyer, David M (DM); Deason, Rebecca G (RG); Ritchey, Maureen (M); Verfaellie, Mieke (M);

Affiliation: Department of Psychology, University of Minnesota, 75 East River Road, Minneapolis, MN 55455, USA. chad.j.marsolek-1(-atsign-)umn.edu

Grants: HD07151 (Agency:NICHD NIH HHS) ; K23MH64004 (Agency:NIMH NIH HHS) ; P50NS26985 (Agency:NINDS NIH HHS)

Journal and publication information

Publication Type: Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.

Journal: Cognitive, affective & behavioral neuroscience (Cogn Affect Behav Neurosci), published in United States. (Language: eng)

Reference: 2006-Sep; vol 6 (issue 3) : pp 163-74

Dates: Created 2007/01/24; Completed 2007/03/02; Revised 2007/12/03;

PMID: 17243353, status: MEDLINE (last retrieval date: 12/26/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Acoustic Stimulation - methods
Adolescent
Adult
Aged
Amnesia - physiopathology
Analysis of Variance
Attention
Case-Control Studies
Concept Formation - physiology
Discrimination (Psychology) - physiology

Discrimination (Psychology) - physiology
Female
Humans
Male
Memory - physiology
Middle Aged
Models, Psychological
Pattern Recognition, Visual - physiology
Photic Stimulation - methods
Reaction Time - physiology

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