SMA

Definition : Spinal Muscular Atrophy
Category : Medical » Diseases & Conditions
Country/Region : Worldwide Worldwide
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What does SMA mean?

Spinal Muscular Atrophy (SMA) is a neuromuscular disease characterized by weakness and wasting (atrophy) in muscle. SMA affects the motor neurons that control muscles.

The term ‘Spinal’ in SMA because most of the motor neurons are located in the spinal cord. 'Muscular' is in the name because it mainly affects the muscles that don’t receive signals from the motor neurons. ‘Atrophy’ is the medical term for wasting away or getting smaller, which is what generally happens to muscles when they’re not active.

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