Hemifacial spasms happen when the muscles on only one side of your face twitch without warning. These types of spasms are caused by damage or irritation to the facial nerve, which is also known as the seventh cranial nerve. Facial spasms occur when the muscles contract involuntarily because of this nerve irritation. Hemifacial spasms are also known as tic convulsif. At first, they may appear only as small, barely noticeable tics around your eyelid, cheek, or mouth. Over time, the tics may expand to other parts of your face.
The Trigeminal (V) and Facial (VII) Cranial Nerves
Types of facial nerve disorder
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There are close functional and anatomical relationships between cranial nerves V and VII in both their sensory and motor divisions. Sensation on the face is innervated by the trigeminal nerves V as are the muscles of mastication, but the muscles of facial expression are innervated mainly by the facial nerve VII as is the sensation of taste. This article briefly reviews the anatomy of these cranial nerves, disorders of these nerves that are of particular importance to psychiatry, and some considerations for differential diagnosis. Recently, the interaction between the sensory parts of cranial verves V and VII has been illuminated.
Download Facial Nerve Disorders Brochure. The various treatment programs including medications, surgery, and reanimation procedures have been used to improve overall facial function. State of the art diagnostic testing has been able to predict the outcome of a patients with facial nerve weakness. Electrical stimulation may be used as well in order to assist our patients during their recovery.