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tone, spasticity, rigidity: define, measure, relate, and equate

 
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tone, spasticity, rigidity: define, measure, relate, a... - January 19, 2001 2:06:00 PM   
David

 

Posts: 19
Joined: February 9, 2000
From: St. Augustine, FL....USA
Status: offline
Recently, Dr. Chuck Leonard commented on the myotonometer and the measurement of spasticity. This brought up a question within the Neuro team here at USAHS about possibly doing some research on the usefulness, validity (of the myotonometer) in assessing rigidity in people with Parkinson?s disease. In our meeting to discuss this matter, it was evident that there is confusion and ambiguity within our profession about the topics of tone, spasticity, and rigidity. I volunteered to pose some of our questions to the NeuroPT listserve, in order to see what clinicians and researchers had to offer.

1. What is rigidity? And how does one differentiate between rigidity and tone and spasticity?
2. Are the mechanisms for rigidity similar to those for hypertonicity or spasticity?
3. Do we have a consensus on the definition of rigidity?
4. Is the clinical definition the same or different than what is used in research?
5. How is rigidity measured?
6. How does rigidity relate to function?

Thanks for your input!


David A. Lehman, MS, PT
Assistant Professor
University of St. Augustine for Health Sciences
1 University Blvd.
St. Augustine, FL 32086
(904) 826-0084 ext. 227
DALehman@usa.edu
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