Spinal muscular atrophy (SMA) is a genetic disease that causes muscle weakness. According to Spinal Muscular Support UK, there are various forms of the disease that affect different parts of the body and vary in severity.
We’ve put together a list of some of the rarer forms of the disease:
Distal Hereditary Motor Neuropathy Type V
According to the NIH, this form of SMA usually begins in adolescence and primarily affects the nerves in the spinal cord. It leads to muscle weakness and movement problems in the hands and feet. The disease is not life-threatening but may affect gait, along with muscle atrophy in the hands, and foot problems such as high arches.