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Joint position sense is impaired by Parkinson's disease by Shagufta Zia; Frederick Cody; Donald O'Boyle is a scholarly article available to read on EtoBox.

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The abilities of Parkinson's disease (PD) patients, taking routine medication, and of control subjects, to discriminate bilateral differences in the static angular positions of the two elbow joints were studied during passive (subject relaxed) and active (subject contracting to hold position) conditions. On each trial, one of the subject's elbows served as the reference joint (angle 60°) and the other as the test joint (angular range, 54°to 69°, at 3°intervals). Subjects, with eyes closed, were required to discriminate the relative angles of the two elbows. In Experiments 1 (passive condition) and 2 (active condition), parkinsonians (n ‫؍‬ 12) gave significantly fewer correct responses, pooled across sides, than did controls (n ‫؍‬ 12), both in total scores across all angles and at individual test angles of 57°and 63°. In Experiment 3 (passive condition), derivation of conventional psychophysical variables indicated that both the difference limen (DL; threshold) and Weber ratio (WR; discriminatory sensitivity, independent of absolute stimulus values; same as DL/PSE) values of patients (n ‫؍‬ 6) were significantly larger than those of controls (n ‫؍‬ 6), in the absence of a signific

Author

Shagufta Zia; Frederick Cody; Donald O'Boyle

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0364-5134)

Published

2000

Language

EN