Pathologic atrophy of muscles can occur with diseases of the motor nerves, or diseases of the muscle tissue itself. Examples of atrophying nerve diseases include CMT (Charcot Marie Tooth syndrome) poliomyelitis, amyotrophic lateral sclerosis (ALS or Lou Gehrig's disease), and Guillain-Barré syndrome. Examples of atrophying muscle diseases include muscular dystrophy, myotonia congenita, and myotonic dystrophy. Changes in Na+ channel isoform expression and spontaneous activity in muscle called fibrillation can also result in muscle atrophy. |
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