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All about hemifacial spasm causes of hemifacial spasm symptoms of hemifacial spasm treatment for hemifacial spasm

What is hemifacial spasm?

Hemifacial spasm (also called tic convulsif) is an involuntary twitching of the facial muscles on one side of the face. 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. The facial nerve is primarily a motor nerve, meaning it controls muscles that move the eyebrows, close the eyes, and move the mouth and lips. Hemifacial spasm is a neuromuscular disorder characterized by frequent involuntary contractions of the muscles on one side of the face. The disorder occurs in both men and women, although it more frequently affects middle-aged or elderly women. The first symptom is usually an intermittent twitching of the eyelid muscle that can lead to forced closure of the eye. The spasm may then gradually spread to involve the muscles of the lower face, which may cause the mouth to be pulled to one side. Eventually the spasms involve all of the muscles on one side of the face almost continuously. The condition may be caused by a facial nerve injury or a tumor, or it may have no apparent cause. Very commonly, hemifacial spasm is caused by a blood vessel pressing on the facial nerve.

More information on hemifacial spasm

What is hemifacial spasm? - Hemifacial spasm (also called tic convulsif) is an involuntary twitching of the facial muscles on one side of the face.
What causes hemifacial spasm? - Hemifacial spasms are usually caused by a damaged facial nerve, which carries signals from the brain to the facial muscles.
What're the symptoms of hemifacial spasm? - Hemifacial spasm tends to affect the left side of the face more often than the right. Hemifacial spasm may develop gradually.
What's the treatment for hemifacial spasm? - Treatment of hemifacial spasm usually involves injecting botulinum toxin (Botox) into the affected muscles.
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