Facial spasm

Also Known As: Hemifacial spasm, Blepharospasm, Facial spasm

Hemifacial spasm (HFS) is a rare neuromuscular disease characterized by irregular, involuntary muscle contractions (spasms) on one side (hemi-) of the face (-facial).[1] The facial muscles are controlled by the facial nerve (seventh cranial nerve), which originates at the brainstem and exits the skull below the ear where it separates into five main branches.


A simple blepharospasm (from Greek: blepharon, eyelid, and spasm, an uncontrolled muscle contraction), is any abnormal contraction or twitch of the eyelid.

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