Condition Spinal Muscular Atrophy (SMA) Spinal muscular atrophy is when muscles throughout the body are weakened because nerve cells in the spinal cord and brainstem do not work properly. Find a Doctor See Related Programs
Condition X-linked Myotubular Myopathy X-linked myotubular myopathy is caused by a genetic mutation on the X chromosome, and it causes muscle weakness. Find a Doctor See Related Programs
