Funding agencies: This study was supported by a grant (N N404 166934) from the Ministry of Science and Higher Education of Poland.
Article first published online: 28 JUN 2011
Copyright © 2011 Movement Disorder Society
Volume 26, Issue 11, pages 2119–2122, September 2011
How to Cite
Marusiak, J., Jaskólska, A., Budrewicz, S., Koszewicz, M. and Jaskólski, A. (2011), Increased muscle belly and tendon stiffness in patients with Parkinson's disease, as measured by myotonometry. Mov. Disord., 26: 2119–2122. doi: 10.1002/mds.23841
Relevant conflicts of interest/financial disclosures: Nothing to report.
Full financial disclosures and author roles may be found in the online version of this article.
- Issue published online: 19 SEP 2011
- Article first published online: 28 JUN 2011
- Manuscript Accepted: 23 MAY 2011
- Manuscript Revised: 19 MAY 2011
- Manuscript Received: 19 FEB 2011
- Parkinson's disease;
- muscle passive stiffness;
Based on Davis's law, greater tonus of the muscle belly in individuals with Parkinson's disease can create greater tension in the tendon, leading to structural adjustment and an increase in tendon stiffness. Our study aimed to separately assess passive stiffness in the muscle belly and tendon in medicated patients with Parkinson's disease, using myotonometry.
We tested 12 patients with Parkinson's disease and 12 healthy matched controls. Passive stiffness of muscle belly and tendon was estimated by myotonometry, electromyography, and mechanomyography in relaxed biceps and triceps brachii muscles.
Compared with controls, patients with Parkinson's disease had higher stiffness in the muscle belly and tendon of the biceps brachii and in the tendon of the triceps brachii. In patients with Parkinson's disease, there was a positive correlation between muscle belly stiffness and parkinsonian rigidity in the biceps brachii.
Patients with Parkinson's disease have higher passive stiffness of the muscle belly and tendon than healthy matched controls. © 2011 Movement Disorder Society