Spinal muscular atrophy (SMA) is a genetic disease affecting…
Spinal muscular atrophy (SMA) is a genetic disease affecting the central nervous system, peripheral nervous system, and voluntary muscle movement (skeletal muscle). SMA is caused by a deficiency of a motor neuron protein called SMN, for “survival of motor neuron.” This protein, is necessary for normal motor neuron function. SMN plays a pivotal role in gene expression in motor neurons. There are four types of SMA. Which type is the most severe?
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