Is spasticity is related to Parkinson's? May I know how it occurs/source of origination? Controlling techniques adopted by doctor ? How do they measure the spastic region currently? Is it a Chart/ Instrument and what are the costs? Are there spasticity types?
http://www.telability.org/handouts/TelAbilityHandoutEvaluatingSpasticity.pdf
This is from 2003 but offers several ways to evaluate spasticity.
http://en.wikipedia.org/wiki/Parkinson%27s_disease
This is a discussion of Parkinson's Disease and may answer some of your questions.
http://www.slideshare.net/gavinyap/descending-tract-diagram-final
This discusses the pyramidal and extrapyramidal tracts. Parkinson's disease is associated with an extrapyramidal tract lesion and spasticity with a pyramidal tract lesion. I do not think it would be appropriate to evaluate a patient with Parkinson's with a measure that is designed to evaluate spasticity.
I am a physical therapist and have evaluated people with rigidity and people with spasticity. They feel different to the touch. When passively moving a limb through it's range of motion, spasticity increases with increase in the speed of motion and with speed of changes between flexion and extension of the limb. The rigidity (amount of resistance) in the muscle of a person with Parkinson's, does not change with speed or motion.
I hope I have understood your question correctly and that this is helpful.
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