Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14735
Title: Quantitative measurement of trunk rigidity in parkinsonian patients
Authors: Mak, MKY 
Wong, ECY
Hui-Chan, CWY
Keywords: Objective measurement
Parkinson's disease
Rigidity
Speed
Trunk
Issue Date: 2007
Publisher: Springer
Source: Journal of neurology, 2007, v. 254, no. 2, p. 202-209 How to cite?
Journal: Journal of neurology 
Abstract: We aimed to develop an objective measurement to quantify trunk rigidity in patients with Parkinson's disease (PD), and to examine its reliability, validity and sensitivity in differentiating PD patients from control subjects. In Study 1, an isokinetic dynamometer was employed to assess trunk rigidity in 6 PD patients and 6 healthy controls. Passive trunk flexion and extension at 4 angular velocities were applied and resistive torques were recorded. Both work done and resistive peak torques to passive trunk flexion (TorquePF) and extension (TorquePE) were found to be highly reliable within a 2-day interval in PD patients and control subjects. In Study 2, trunk muscle tone was compared between 15 PD and 15 control subjects. Significantly higher muscle tone, as shown by increases in work done, and in TorquePF and TorquePE at higher movement speeds, was found in PD patients. Within each subject group, resistive trunk muscle tone was found to increase with increasing velocity of passive movement, but the extent of increase was greater in PD patients. Our results thus suggest that the objective method developed by us was reliable and could differentiate trunk rigidity in PD patients from that of healthy subjects.
URI: http://hdl.handle.net/10397/14735
ISSN: 0340-5354
EISSN: 1432-1459
DOI: 10.1007/s00415-006-0327-4
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