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Myopathy is a disease of muscle in which the muscle fibers do not function properly. This results in muscular weakness. Myopathy simply means muscle disease (Greek myo- muscle + patheia < -pathy suffering). This meaning implies that the primary defect is within the muscle, as opposed to the nerves (neuropathies or neurogenic disorders) or elsewhere (e.g., the brain).
General Discussion. Distal myopathy (or distal muscular dystrophy) is a general term for a group of rare progressive genetic disorders characterized by wasting (atrophy) and weakness of the voluntary distal muscles.