Twitch muscle
Most patients with primary facial spasm develop symptoms after middle age, and there are many females. In the early stage of the disease, paroxysmal convulsions on one side of the orbicularis muscle gradually spread to the other facial muscles on one side of the face. The convulsions of the corner muscles are most noticeable. In severe cases, the neck on the same side can be affected. Muscle, but the frontal muscle is less involved.
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