The effects of increased cognitive processing on reactive balance control following perturbations to the upper limb
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: Trotman, Megan
issued: 2020-12-10T18:23:53Z
issued: 2020
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: While most reactive balance control studies have used whole-body perturbations, research is limited regarding how whole-body balance adjustments are integrated with continuous voluntary reaching movements when a hand perturbation is encountered. Further, when two tasks are performed simultaneously through a dual-task paradigm, performance of one or both tasks is often disrupted owing to attentional resources being divided. However, it is unclear how reactive whole-body balance responses to hand perturbations adjust when paired with a cognitive-motor task. The purpose of this study was to assess the effects of increased cognitive processing on reactive whole-body balance responses to perturbations of the hand during a continuous voluntary reaching task. Sixteen participants (8 females, 22.9 ± 4.5 years) stood and held the handle of a KINARM, a robotic-controlled manipulandum paired with an augmented visual display. Participants completed 10 trials of 100 continuous mediolateral arm movements while receiving 20 randomly interspersed anteroposterior hand perturbations throughout each trial. Participants moved their right hand at a pace of 60 beats per minute between two targets, with the hand moving towards the next target at each beat (single-task). An auditory n-back task was performed during half of the trials (dual-task), and during a quiet standing baseline trial (cognitive-motor task only). Peak centre of pressure (COP) displacement and velocity as well as time to COP displacement onset and peak following the hand perturbation were evaluated. During dual- compared to cognitive-motor task condition, n-back response times increased and percentage of correct responses decreased, indicating an increase in cognitive processing. Only peak COP displacement upon posterior perturbations during leftward reaching increased, and time to COP displacement onset upon anterior perturbations during rightward reaching decreased during dual- compared to single-task. However, there …
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/76731
note: THE EFFECTS OF INCREASED COGNITIVE PROCESSING ON REACTIVE BALANCE CONTROL FOLLOWING PERTURBATIONS TO THE UPPER LIMB by Megan Trotman BHK, The University of British Columbia, 2016 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) December 2020 © Megan Trotman, 2020 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis entitled: The effects of increased cognitive processing on reactive balance control following perturbations to the upper limb submitted by Megan Trotman in partial fulfillment of the requirements of the degree of Master of Science Dr. Brian H. Dalton, School of Health and Exercise Science Supervisor Dr. Jennifer M. Jakobi, School of Health and Exercise Science Supervisory Committee Member Dr. Paul van Donkelaar, School of Health and Exercise Science Supervisory Committee Member Dr. Mark G. Carpenter, School of Kinesiology, University of British Columbia, Vancouver University Examiner iii Abstract While most reactive balance control studies have used whole-body perturbations, research is limited regarding how whole-body balance adjustments are integrated with continuous voluntary reaching movements when a hand perturbation is encountered. Further, when two tasks are performed simultaneously through a dual-task paradigm, performance of one or both tasks is often disrupted owing to attentional resources being divided. However, it is unclear how reactive whole-body balance responses to hand perturbations adjust when paired with a cognitive-motor task. The purpose of this study was to assess the effects of increased cognitive processing on reactive whole-body balance responses to perturbations of the hand during a continuous voluntary reaching task. Sixteen participants (8 females, 22.9 ± 4.5 years) stood and held the hand…
has type: Thesis/Dissertation
date issued: 2021-02
is shown at: 10.14288/1.0395219
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
type: Text
identifier URI: http://hdl.handle.net/2429/76731