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Definition of Fasciculation

Fasciculation: Involuntary contractions or twitchings of groups of muscle fibers. Fasciculations can occur in normal individuals without an associated disease or condition, or as a result of illness, such as muscle cramps, nerve diseases, and metabolic imbalances.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=13290
Last Editorial Review: 3/19/2012

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