Does an inverted pendulum model accurately represent the gait of individuals with unilateral transfemoral amputation while walking over level ground?

Strutzenberger, G, Alexander, N, De Asha, A, Schwameder, H and Barnett, CT ORCID: https://orcid.org/0000-0001-6898-9095, 2019. Does an inverted pendulum model accurately represent the gait of individuals with unilateral transfemoral amputation while walking over level ground? Prosthetics and Orthotics International, 43 (2), pp. 221-226. ISSN 0309-3646

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Abstract

Study Design: Controlled trial

Background: An inverted pendulum model represents the mechanical function of able-bodied walking accurately, with centre of mass height and forward velocity data plotting as sinusoidal curves, 180 degrees out of phase.

Objectives: The current study investigated whether the inverted pendulum model represented level gait in individuals with a unilateral transfemoral amputation.

Methods: Kinematic and kinetic data from ten individuals with unilateral transfemoral amputation and fifteen able-bodied participants were recorded during level walking.

Results: During level walking, the inverted pendulum model described able-bodied gait well throughout the gait cycle, with median relative time shifts between centre of mass height and velocity maxima and minima of between 1.2%-1.8% of gait cycle. In the group with unilateral transfemoral amputation, the relative time shift was significantly increased during the prosthetic limb initial double-limb support phase by 6.3%.

Conclusion: The gait of individuals with unilateral transfemoral amputation shows deviation from a synchronous inverted pendulum model during prosthetic limb stance. The reported divergence may help explain such individuals’ increased metabolic cost of gait. Temporal divergence of inverted pendulum behaviour could potentially be utilised as a tool to assess the efficacy of prosthetic device prescription.

Item Type:	Journal article
Publication Title:	Prosthetics and Orthotics International
Creators:	Strutzenberger, G., Alexander, N., De Asha, A., Schwameder, H. and Barnett, C.T.
Publisher:	Sage
Date:	1 April 2019
Volume:	43
Number:	2
ISSN:	0309-3646
Identifiers:	Number Type 10.1177/0309364618796847 DOI
Divisions:	Schools > School of Science and Technology
Record created by:	Jonathan Gallacher
Date Added:	16 Jul 2018 09:59
Last Modified:	17 Sep 2019 15:06
URI:	https://irep.ntu.ac.uk/id/eprint/34077

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