Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/137196
Title: EXAMINING THE EFFECTS OF SLEEP DEPRIVATION ON THE QUALITY OF INFORMATION PROCESSING
Authors: POH JIA HOU
Keywords: Sleep deprivation, Information processing, Attention, Memory, Executive control, fMRI
Issue Date: 9-May-2017
Citation: POH JIA HOU (2017-05-09). EXAMINING THE EFFECTS OF SLEEP DEPRIVATION ON THE QUALITY OF INFORMATION PROCESSING. ScholarBank@NUS Repository.
Abstract: In an attempt to increase the hours of productivity, the voluntary curtailment of sleep has become an increasingly common means of coping with demands of work or school. However, sleep deprivation can have pronounced negative effects on various cognitive faculties, reducing the efficiency of work performance in subsequent wake hours. Functional neuroimaging studies have consistently revealed attenuated task-related activation in fronto-parietal circuitries and higher perceptual processing regions in sleep-deprived individuals, but it remains unclear if this attenuation also contributes to the degradation of neural representations and compromised information processing. Using a combination of behavioral methods and functional MRI, I showed that sleep deprivation degrades the quality of neural representations during encoding, which was suggestive of poorer information quality. In Experiment II, I showed that degraded cortical representations in higher visual processing regions were not due to perceptual dedifferentiation. Rather, they were related to impaired top-down modulation of attention. In Experiment III, I showed that impaired top-down modulation could affect performance even in the absence of exogenous distractors, leading to increases in mind-wandering episodes. Together, these findings demonstrate that even during periods where cognitive performance appears normal, sleep deprivation can have substantial cost on the quality of information processing.
URI: http://scholarbank.nus.edu.sg/handle/10635/137196
Appears in Collections:Ph.D Theses (Open)

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