Distributed and overlapping neural substrates for object individuation and identification in visual short-term memory

Naughtin, Claire K., Mattingley, Jason B. and Dux, Paul E. (2014) Distributed and overlapping neural substrates for object individuation and identification in visual short-term memory. Cerebral Cortex, 26 2: 566-575. doi:10.1093/cercor/bhu212


Author Naughtin, Claire K.
Mattingley, Jason B.
Dux, Paul E.
Title Distributed and overlapping neural substrates for object individuation and identification in visual short-term memory
Journal name Cerebral Cortex   Check publisher's open access policy
ISSN 1047-3211
1460-2199
Publication date 2014-09-12
Year available 2014
Sub-type Article (original research)
DOI 10.1093/cercor/bhu212
Open Access Status
Volume 26
Issue 2
Start page 566
End page 575
Total pages 10
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2015
Language eng
Abstract Object individuation and identification are 2 key processes involved in representing visual information in short-term memory (VSTM). Individuation involves the use of spatial and temporal cues to register an object as a distinct perceptual event relative to other stimuli, whereas object identification involves extraction of featural and related conceptual properties of a stimulus. Together, individuation and identification provide the “what,” “where,” and “when” of visual perception. In the current study, we asked whether individuation and identification processes are underpinned by distinct neural substrates, and to what extent brain regions that reflect these 2 operations are consistent across encoding, maintenance, and retrieval stages of VSTM. We used functional magnetic resonance imaging to identify brain regions that represent the number of objects (individuation) and/or object features (identification) in an array. Using univariate and multivariate analyses, we found substantial overlap between these 2 operations in the brain. Moreover, we show that regions supporting individuation and identification vary across distinct stages of information processing. Our findings challenge influential models of multiple-object encoding in VSTM, which argue that individuation and identification are underpinned by a limited set of nonoverlapping brain regions.
Keyword fMRI
Multivoxel pattern analysis
Neural object file theory
Object segmentation
Visual short-term memory
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes First published online: 12 September 2014.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Brain Institute Publications
Official 2015 Collection
School of Psychology Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 0 times in Thomson Reuters Web of Science Article
Scopus Citation Count Cited 0 times in Scopus Article
Google Scholar Search Google Scholar
Created: Mon, 16 Feb 2015, 12:35:14 EST by Susan Day on behalf of Queensland Brain Institute