NDLI: Evidence for working memory storage operations in perceptual cortex.

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Evidence for working memory storage operations in perceptual cortex.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Sreenivasan, Kartik K. Gratton, Caterina Vytlacil, Jason D'Esposito, Mark
Description	Author Affiliation: Sreenivasan KK ( Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA, kartik.sreenivasan@nyu.edu.)
Abstract	Isolating the short-term storage component of working memory (WM) from the myriad of associated executive processes has been an enduring challenge. Recent efforts have identified patterns of activity in visual regions that contain information about items being held in WM. However, it remains unclear (1) whether these representations withstand intervening sensory input and (2) how communication between multimodal association cortex and the unimodal perceptual regions supporting WM representations is involved in WM storage. We present evidence that the features of a face held in WM are stored within face-processing regions, that these representations persist across subsequent sensory input, and that information about the match between sensory input and a memory representation is relayed forward from perceptual to prefrontal regions. Participants were presented with a series of probe faces and indicated whether each probe matched a target face held in WM. We parametrically varied the feature similarity between the probe and target faces. Activity within face-processing regions scaled linearly with the degree of feature similarity between the probe face and the features of the target face, suggesting that the features of the target face were stored in these regions. Furthermore, directed connectivity measures revealed that the direction of information flow that was optimal for performance was from sensory regions that stored the features of the target face to dorsal prefrontal regions, supporting the notion that sensory input is compared to representations stored within perceptual regions and is subsequently relayed forward. Together, these findings indicate that WM storage operations are carried out within perceptual cortex.
File Format	HTM / HTML
ISSN	15307026
e-ISSN	1531135X
DOI	10.3758/s13415-013-0246-7
Journal	Cognitive, Affective, & Behavioral Neuroscience
Issue Number	1
Volume Number	14
Language	English
Publisher	Springer
Publisher Date	2014-03-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Behavioral Sciences Discipline Neurology Cerebral Cortex Physiology Memory, Short-term Pattern Recognition, Visual Adolescent Brain Mapping Magnetic Resonance Imaging Neural Pathways Neuropsychological Tests Photic Stimulation Prefrontal Cortex Signal Processing, Computer-assisted
Content Type	Text
Resource Type	Article
Subject	Cognitive Neuroscience Behavioral Neuroscience

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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