Fasciculation

Fasciculation
Other namesMuscle twitch
Animated image showing involuntary twitching in the upper eyelid of a young adult male
Animated image showing involuntary twitching in the upper eyelid of a young adult male
Pronunciation
SpecialtyNeurology

A fasciculation, or muscle twitch, is a spontaneous, involuntary muscle contraction and relaxation, involving fine muscle fibers.[1] They are common, with as many as 70% of people experiencing them.[1] They can be benign, or associated with more serious conditions.[1] When no cause or pathology is identified, they are diagnosed as benign fasciculation syndrome.[1]

  1. ^ a b c d Blackman G, Cherfi Y, Morrin H, et al. (2019). "The association between benign fasciculations and health anxiety: a report of two cases and a systematic review of the literature" (PDF). Psychosomatics. 60 (5): 499–507. doi:10.1016/j.psym.2019.04.001. PMID 31174866. S2CID 146012381.