dystonia musculorum deformans
[mŭs′kyə-lôr′əm dē-fôr′mənz]
n.
A disease, especially of children, characterized by muscular contractions that produce distortions of the spine and hips with the muscles being spastic when in action and without tension when at rest.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.