The effects of 24 hours of sleep deprivation on the vestibular control of standing balance
department or school: Health and Social Development, Faculty of (Okanagan)
department or school: Health and Exercise Sciences, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Copeland, Paige
issued: 2021-07-30T15:13:20Z
issued: 2021
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: Sleep deprivation (SD) is a common condition in today’s society. SD can impair cognitive and sensorimotor functioning, including that of the vestibular system, as increases in vestibulo-ocular reflex gain have been documented following SD. Further, SD can influence postural control negatively, though results are not conclusive, and the physiological reasoning behind the observed impairments in standing balance remains unclear. PURPOSE: The purpose was to examine the effect of 24-h SD on the vestibular control of standing balance. It was hypothesized that after 24-h SD, vestibular-evoked balance responses would increase compared to the well-rested control state. METHODS: During a well-rested and SD condition, nine healthy females (22.8 ± 2.9 years) completed two 90-s trials of binaural, bipolar stochastic electrical vestibular stimulation (EVS; 0-25 Hz, root-mean-square = 1.1 mA) and two 120-s trials of quiet stance on a force plate. Mediolateral (ML) ground reaction forces and surface electromyography of the right medial gastrocnemius (MG) were sampled and cross-correlated against the EVS signal to quantify vestibular control of balance within the frequency (gain and coherence) and time (cumulant density) domain. RESULTS: Overall, SD did not alter any quiet stance parameters (p ≥ 0.06). In the time domain, sleep deprivation did not alter the EVS-MG (p=0.51) nor the EVS-ML force (p=0.06) peak-to-peak amplitude. Sleep deprivation had limited effect on the EVS-MG and EVS-ML force coherence, but there were greater normalized gain amplitudes for EVS-MG (<8, 11-24Hz) and EVS-ML force (0.5-9Hz) following SD than the well-rested control. CONCLUSION: Despite a lack of SD-related changes to quiet standing balance parameters, nor changes to the cumulant density estimates and coherence, the gain of the vestibular-evoked balance response increased with SD. The current findings likely indicate that SD leads to higher sensitivity of the central nervous system when transforming ves…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/79155
note: THE EFFECTS OF 24 HOURS OF SLEEP DEPRIVATION ON THE VESTIBULAR CONTROL OF STANDING BALANCE by Paige Copeland BHK, The University of British Columbia, 2019 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE in THE COLLEGE OF GRADUATE STUDIES (Health and Exercise Sciences) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) July 2021 © Paige Copeland, 2021 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis/dissertation entitled: The effects of 24 hours of sleep deprivation on the vestibular control of standing balance submitted by Paige Copeland in partial fulfillment of the requirements of the degree of Master of Science Dr. Brian Dalton, School of Health and Exercise Science Supervisor Dr. Chris McNeil, School of Health and Exercise Science Supervisory Committee Member Dr. Paul van Donkelaar, School of Healthy and Exercise Science Supervisory Committee Member Dr. Vicki Komisar, School of Engineering University Examiner iii Abstract Sleep deprivation (SD) is a common condition in today’s society. SD can impair cognitive and sensorimotor functioning, including that of the vestibular system, as increases in vestibulo-ocular reflex gain have been documented following SD. Further, SD can influence postural control negatively, though results are not conclusive, and the physiological reasoning behind the observed impairments in standing balance remains unclear. PURPOSE: The purpose was to examine the effect of 24-h SD on the vestibular control of standing balance. It was hypothesized that after 24-h SD, vestibular-evoked balance responses would increase compared to the well-rested control state. METHODS: During a well-rested and SD condition, nine healthy females (22.8 ± 2.9 years) completed two 90-s trials of binaural, bipolar stochastic electrical vestibular stimulation (EVS; 0-25 Hz, root-mean-square amplitude = 1.1 mA) and two 120-s trials of quiet …
has type: Thesis/Dissertation
date issued: 2021-09
is shown at: 10.14288/1.0401119
language: eng
degree discipline: Health and Exercise Sciences
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Dalton, Brian H.
type: Text
identifier URI: http://hdl.handle.net/2429/79155