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ShareSpinal Muscular Atrophy (SMA) is a term applied to a number of different disorders, all having in common a genetic cause and the manifestation of weakness due to loss of the motor neurons of the spinal cord and brainstem.
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The most common form of SMA is caused by mutation of the SMN gene, and manifests over a wide range of severity affecting infants through adults.
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Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Spinal muscular atrophy at Wikipedia.org. See the Wikipedia copyright page for more details.
Editor's Note: This article is not intended to provide medical advice, diagnosis or treatment.
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