The functional role of asymmetrical lateral trunk sway in prosthetic walkers : Generation of push off work and balance control as explanations

Hubert, N.L. (2013) The functional role of asymmetrical lateral trunk sway in prosthetic walkers : Generation of push off work and balance control as explanations. thesis, Human Movement Sciences.

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Abstract

Asymmetrical lateral trunk sway is observed in prosthetic walkers and can be explained by either loss of balance control or generation of push off work. The aim of the present study was to gain more insight in the functional role of asymmetrical lateral trunk sway, which was studied by inducing asymmetrical lateral trunk sway in healthy subjects by means of different orthoses. Eighteen healthy subjects walked at two cadences, two velocities and with four orthoses; no restrictions of ankle movements, restricted inversion and eversion, restricted plantarflexion and dorsiflexion and restrictions of all ankle movements. Maximal trunk angle was higher when walking at a lower cadence compared to walking at a high cadence for both the impaired and unimpaired side. For walking at a high velocity, maximal trunk angle was higher than when walking at a low velocity for both the impaired and unimpaired side. When plantarflexion and dorsiflexion were restricted, maximal trunk angle was higher when walking at a lower velocity, compared to no ankle movements restricted on the impaired side. When walking at higher velocity, maximal trunk angle was higher when plantarflexion and dorsiflexion were restricted, compared to no ankle movements restricted on the impaired side. Stance time was longer at the low velocity compared to walking at a high velocity for both the unimpaired and impaired side. On the unimpaired side the stance time was longer for the lower cadence than when walking at a higher cadence. The results of this study do not prove that lateral trunk sway is needed for balance. The results do indicate that lateral trunk sway could be used to generate power for push off.

Item Type:	Thesis (Thesis)
Supervisor name:	Supervisors: and Hal, E.S. van MSc and Otten, Prof. dr. E. and Institution: Department of Human Movement Science, Universit and Groningen, the Netherlands
Faculty:	Medical Sciences
Date Deposited:	25 Jun 2020 10:55
Last Modified:	25 Jun 2020 10:55
URI:	https://umcg.studenttheses.ub.rug.nl/id/eprint/1606

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