Source:http://linkedlifedata.com/resource/umls/id/C0151786
MSH: A vague complaint of debility, fatigue, or exhaustion attributable to weakness of various muscles. The weakness can be characterized as subacute or chronic, often progressive, and is a manifestation of many muscle and neuromuscular diseases. (From Wyngaarden et al., Cecil Textbook of Medicine, 19th ed, p2251),NCI: A reduction in the strength of one or more muscles.