DMD (dystonia musculorum deformans): Also called torsion dystonia, this is a rare, generalized dystonia (a state of abnormal -- either excessive of inadequate -- muscle tone) that can be inherited, usually begins in childhood, and becomes progressively worse. It can leave individuals seriously disabled and confined to a wheelchair.
Quick GuideDementia, Alzheimer's Disease, and Aging Brains
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Last Editorial Review: 6/14/2012