Poster B5, Sunday, March 26, 8:00 – 10:00 am, Pacific Concourse
The effects of 24-hour sleep deprivation on ERP indices of selective attention and working memory
Malayka Mottarella1, Eve Wiggins1, Seth Eggleston1, Kendra Good1, Ryan Giuliano2, Courtney Stevens1; 1Willamette University, 2University of Oregon
The present study examined the effects of 24-hour sleep deprivation on separate event-related brain potential (ERP) indices of selective attention and working memory. Forty-four adult participants were randomly assigned to either 24-hour sleep deprivation a sleep-as-usual condition. The morning following either sleep deprivation or sleep-as-usual, participants completed ERP selective auditory attention and visual working memory tasks. In the selective attention task, participants attended to one of two auditory stories, played simultaneously to different ears and varying in narrator gender and content. ERPs were timelocked to 100 msec probe stimuli superimposed upon the 'attended' and 'unattended' stories. In the working memory task, participants indicated whether a colored probe square was present in the study array, which varied in set size (2, 4, or 8 squares). ERPs were time-locked to the presentation of the study array, with delay activity in the interval preceding presentation of the probe square compared across set sizes. Results indicated the sleep deprivation affected both selective attention and working memory. While the sleep-as-usual group showed a robust effect of selective attention on the N1, the 24-hour sleep deprivation group showed no effects of selective attention on early neural processing. In the working memory task, group differences were also observed and were largest at the smallest set sizes. Taken together, these data suggest that sleep deprivation impairs the earliest stages of processing affected by selective attention as well as aspects of visual working memory.
Topic Area: ATTENTION: Auditory