Neural correlates of dynamic changes in working memory performance during one night of sleep deprivation.
Total sleep deprivation (TSD) is common in modern society leading to deterioration of multiple aspects of cognition. Dynamic interaction effect of circadian rhythmicity and homeostatic sleep pressure on sustained attention have been intensively investigated, while how this effect was represented on performance and cerebral responses to working memory, another important element of many neurobehavioral tasks, was not well elucidated. Thirty-six healthy subjects with intermediate chronotype performed the Sternberg working-memory task (SWMT) while undergoing functional magnetic resonance imaging every 2 hr from 10:00 p.m. on the first day to 6:00 a.m. on the second day. Using data from three imaging sessions (10:00 p.m., 04:00 a.m., and 06:00 a.m.), we found that the slowest SWMT reaction time and weakest cerebral responses were not at the end of TSD (06:00 a.m.) but during the early morning (04:00 a.m.) hours of the TSD. In addition, during this worst period of TSD, reaction time for the SWMT were found to be negatively correlated with task-related activation in the angular gyrus and positively correlated with the degree of negative correlation between the control and default networks. Our results revealed a rebound of SWMT reaction time and cerebral responses after the mid-time point of regular biological sleep night and provided more evidence that different cognitive tasks are differentially affected by sleep loss and circadian rhythmicity.
['Zhu|Yuanqiang|Y|0000-0001-7685-1539', 'Xi|Yibin|Y|', 'Sun|Jinbo|J|', 'Guo|Fan|F|', 'Xu|Yongqiang|Y|', 'Fei|Ningbo|N|', 'Zhang|Xinxin|X|', 'Yang|Xuejuan|X|', 'Yin|Hong|H|', 'Qin|Wei|W|']
D001288:Attention D001921:Brain D005260:Female D006801:Humans D008279:Magnetic Resonance Imaging D008297:Male D008570:Memory, Short-Term D009415:Nerve Net D009483:Neuropsychological Tests D011597:Psychomotor Performance D011930:Reaction Time D012890:Sleep D012892:Sleep Deprivation D055815:Young Adult
dynamic changes working memory sleep deprivation rebound response