Spinal Muscular Atrophy: Symptoms & Treatment

Spinal muscular atrophy (SMA) is a rare genetic disease that affects the part of nervous system which control muscle movements of the body. The nerve cells, called motor neurons, links the nervous system and muscle fibres. Most of these neurons are situated in spinal cord because of which the disease is named as Spinal muscular atrophy. When brain sends message to contract or relax a muscle, the