Related Conditions and Treatments Search Start typing a name and the list will filter Conditions Treatments Spinal Muscular Atrophy (SMA) Condition Spinal muscular atrophy is when muscles throughout the body are weakened because nerve cells in the spinal cord and brainstem do not work properly. Learn more about Spinal Muscular Atrophy (SMA) X-linked Myotubular Myopathy Condition X-linked myotubular myopathy is caused by a genetic mutation on the X chromosome, and it causes muscle weakness. Learn more about X-linked Myotubular Myopathy
