lab total sleep deprivation

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the Lab over 62 Hours of Total Sleep Deprivation a. Carlsson KEL, Bessey AF, Skeiky L, Prindle NE, Armstrong MP, Devine J, Capaldi VF, Balkin TJ, Doty TJ.
The Impact of At-Home Actigraphy on Performance and Sleepiness in the Lab over 62 Hours of Total Sleep Deprivation a Carlsson KEL, Bessey AF, Skeiky L, Prindle NE, Armstrong MP, Devine J, Capaldi VF, Balkin TJ, Doty TJ Walter Reed Army Institute of Research, Behavioral Biology Branch, Center for Military Psychiatry and Neuroscience, Silver Spring, MD, USA

BACKGROUND

RESULTS At-Home Total Sleep Time Before Laboratory Study

• Little is known about the extent to which prior at-home sleep mediates subsequent performance during sleep loss in the laboratory • The purpose of this study was to determine the extent to which actigraphically-determined, at-home sleep parameters affect performance during a subsequent inlab total sleep deprivation (TSD) study

Correlation between Psychomotor Vigilance Test Speed and At-Home Total Sleep Time Total Sleep Deprivation Day 1 @ 7am

Total Sleep Deprivation Day 2 @ 7am

METHODS • Philips Respironics Actiwatch 2 specifications: 1 minute epoch with both light and activity • Scored using major sleep events only Philips • Performance assessed using speed (i.e. Respironics Actiwatch2 mean reciprocal response time) on a 5-minute Psychomotor Vigilance Test (PVT) • Self-reported sleepiness assessed using Karolinska Sleepiness Scale (KSS) • The BHSAI 2B-Alert webtool (https://2b-alert web.bhsai.org/2b-alert-web) was used to predict the time at which performance was expected to be impacted most over the two nights of total sleep deprivation (circadian nadir)

r = 0.35; p = 0.13

r = 0.50; p = 0.03

Correlation between Karolinska Sleepiness Scale and At-Home Total Sleep Time PVT Speed During Laboratory Study

Total Sleep Deprivation Day 2 @ 7am

RECOVERY SLEEP

Total Sleep Deprivation Day 1 @ 7am

Total Sleep Deprivation 1 7am Total Sleep Deprivation 2 7am

r = 0.31; p = 0.20

r = 0.42; p = 0.07

CONCLUSION Participant Demographics

RECOVERY SLEEP

BHSAI 2B-Alert Web Tool Prediction of Performance during Total Sleep Deprivation

Total Sleep Deprivation 1 7am

Total Sleep Deprivation 2 7am

N

19

Gender

12 M / 7 F

Age

25 ± 4.471

MEQ – MorningnessEveningness Questionnaire

55 ± 8.035

CCQ – Caffeine Consumption Questionnaire

126 ± 145.062

At-home Average Total Sleep Time

433.656 ± 46.903

All variance presented as standard deviation

•Response speed on the PVT was fastest in those individuals who obtained the most sleep at home, prior to sleep deprivation – but this effect was significant only during the second night of sleep deprivation in the lab. •Although the amount of sleep obtained at home mediated PVT performance during subsequent sleep deprivation, it did not mediate subjective sleepiness ratings. •These findings underscore the importance and utility of collecting objective sleep data in the participants’ homes prior to in-lab studies involving sleep loss DISCLAIMER Material has been reviewed by the Walter Reed Army Institute of Research. There is no objection to its presentation and/or publication. The opinions or assertions contained herein are the private views of the author, and are not to be construed as official, or as reflecting true views of the Department of the Army or the Department of Defense. The investigators have adhered to the policies for protection of human subjects as prescribed in AR 70-25