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Optimal Indices for Testing Parkinsonian Rigidity

Published online by Cambridge University Press:  18 September 2015

Heikki Teräväinen ,
Joseph K.C. Tsui ,
Edwin Mak  and
Donald B. Calne
Heikki Teräväinen
Affiliation:
Departments of Paediatrics,Pathology and Clinical Neurosciences, University of Calgary Faculty of Medicine, Calgary
Joseph K.C. Tsui
Affiliation:
Departments of Paediatrics,Pathology and Clinical Neurosciences, University of Calgary Faculty of Medicine, Calgary
Edwin Mak
Affiliation:
Departments of Paediatrics,Pathology and Clinical Neurosciences, University of Calgary Faculty of Medicine, Calgary
Donald B. Calne*
Affiliation:
Departments of Paediatrics,Pathology and Clinical Neurosciences, University of Calgary Faculty of Medicine, Calgary
*
Department of Medicine, Division of Neurology, Rm S129, ACU, University Hospital, 2211 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 1W
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Abstract:

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We assessed parkinsonian rigidity objectively at the wrist to determine the optimal angular velocity and displacement for detecting abnormality. The wrist was moved passively with a torque motor and the average work done for one complete cycle was computed. This objective rigidity score (ORS) was compared with a clinical rigidity score (CRS). ORS was more pronounced at faster movement velocities in parkinsonian patients, whereas in normal subjects there was only a modest increase in the score. Angular velocities of 140 to 190 degrees/second and displacements of ±25 to ±30 degrees were most sensitive for detecting parkinsonian rigidity and had good correlation with the CRS.

Type
Original Articles
Information
Canadian Journal of Neurological Sciences , Volume 16 , Issue 2 , May 1989 , pp. 180 - 183
Copyright
Copyright © Canadian Neurological Sciences Federation 1989

References

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