How common is spinal musclar atorphy?
There are diffrent types of SMA (Spinal Musclar Atorphy). Approximately 1 in 10,000 births have been diagnosed with SMA. SMA affects more then 10,000 to 25,000 children. The most common is SMA type 1. The next common is SMA type 2 and 3. SMA type 0 and 4 are the most rare to have. After a spinal cord injury weight loss and muscle atrophy are common to happen.