Spinal muscular atrophy

Spinal muscular atrophy [r]: A group of disorders marked by progressive degeneration of motor neurons in the spinal cord, resulting in weakness and muscular atrophy, usually without evidence of injury to the corticospinal tracts. [e]

This article contains just a definition and optionally other subpages (such as a list of related articles), but no metadata. Create the metadata page if you want to expand this into a full article.