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Title: An Instrumented Pull Test to Characterize Postural Responses
Authors: Tan, Joy
Thevathasan, Wesley
McGinley, Jennifer
Brown, Peter
Perera, Thushara
Keywords: Behaviour
Postural reflex
Postural instability
Postural control
Pull test
Issue Date: Apr-2019
Publisher: Journal of Visualized Experiments: JoVE
Citation: Tan, J., W. Thevathasan, J. McGinley, P. Brown, and T. Perera. 2019. An Instrumented Pull Test to Characterize Postural Responses. Journal of visualized experiments : JoVE(146): e59309.
Abstract: Impairment of postural reflexes, termed postural instability, is a common and disabling deficit in Parkinson's disease. To assess postural reflexes, clinicians typically employ the pull test to grade corrective responses to a backward perturbation at the shoulders. However, the pull test is prone to issues with reliability and scaling (score/4). Here, we present an instrumented version of the pull test to more precisely quantify postural responses. Akin to the clinical test, pulls are manually administered except pull force is also recorded. Displacements of the trunk and feet are captured by a semi-portable motion tracking system. Raw data represent distance traveled (in millimeter units), making subsequent interpretation and analysis intuitive. The instrumented pull test also detects variabilities influencing pull test administration, such as pull force, thereby identifying and quantifying potential confounds that can be accounted for by statistical techniques. The instrumented pull test could have application in studies seeking to capture early abnormalities in postural responses, track postural instability over time, and detect responses to therapy.
URI: http://repository.bionicsinstitute.org:8080/handle/123456789/345
ISSN: 1940-087x
Appears in Collections:Neurobionics Research Publications

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