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Abstract
Behavior
ERRATUM NOTICE
Important: There has been an erratum issued for this article. Read more …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.
Erratum
Erratum: An Instrumented Pull Test to Characterize Postural ResponsesAn erratum was issued for: An Instrumented Pull Test to Characterize Postural Responses. Author affiliations were updated.
The affiliations for Joy Tan were updated from:
1. Department of Medical Bionics, The University of Melbourne
2. Department of Neurology, The Royal Melbourne Hospital
to:
1. Department of Medical Bionics, The University of Melbourne
2. Department of Neurology, The Royal Melbourne Hospital
4. The Bionics Institute
The affiliations for Thushara Perera were updated from:
1. Department of Medical Bionics, The University of Melbourne
3. Department of Neurology, Austin Hospital
to:
1. Department of Medical Bionics, The University of Melbourne
4. The Bionics Institute
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