Please use this identifier to cite or link to this item: https://doi.org/10.1073/pnas.0610712104
Title: Functional neuroimaging and behavioral correlates of capacity decline in visual short-term memory after sleep deprivation
Authors: Chee, M.W.L. 
Chuah, Y.M.L. 
Keywords: Attention
Extrastriate cortex
Fatigue
Functional MRI
Parietal cortex
Issue Date: 29-May-2007
Citation: Chee, M.W.L., Chuah, Y.M.L. (2007-05-29). Functional neuroimaging and behavioral correlates of capacity decline in visual short-term memory after sleep deprivation. Proceedings of the National Academy of Sciences of the United States of America 104 (22) : 9487-9492. ScholarBank@NUS Repository. https://doi.org/10.1073/pnas.0610712104
Abstract: Sleep deprivation (SD) impairs short-term memory, but it is unclear whether this is because of reduced storage capacity or processes contributing to appropriate information encoding. We evaluated 30 individuals twice, once after a night of normal sleep and again after 24 h of SD. In each session, we evaluated visual memory capacity by presenting arrays of one to eight colored squares. Additionally, we measured cortical responses to varying visual array sizes without engaging memory. The magnitude of intraparietal sulcus activation and memory capacity after normal sleep were highly correlated. SD elicited a pattern of activation in both tasks, indicating that deficits in visual processing and visual attention accompany and could account for loss of short-term memory capacity. Additionally, a comparison between better and poorer performers showed that preservation of precuneus and temporoparietal junction deactivation with increasing memory load corresponds to less performance decline when one is sleep-deprived. © 2007 by The National Academy of Sciences of the USA.
Source Title: Proceedings of the National Academy of Sciences of the United States of America
URI: http://scholarbank.nus.edu.sg/handle/10635/110090
ISSN: 00278424
DOI: 10.1073/pnas.0610712104
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