Spasticity involves involuntary muscle stiffness and/or spasms—sustained muscle contractions or sudden movements. It is one of the more common symptoms of MS.

This web page provides readers with a comprehensive resource for movement disorder information and links to other related movement disorder activities on the Web.

This web site provides basic information on biomedical research on disorders of the brain and nervous system. Links are also provided to a US web site recruiting people for clinical trials for spasticity drugs

This page concentrates on spasticity in MS and gives abstracts to a number of recent research papers on the subject.

Spasticity, defined as a velocity-dependent increase in tonic stretch reflexes, is common in patients with multiple sclerosis due to plaque formation in the brain and spinal cord.