面肌痉挛(又称半面痉挛、面肌抽搐)为一侧面部肌肉不自主的无痛性阵发性抽搐。起初下眼睑或上眼睑不时出现跳动。很多患者以为眼皮跳是常有的现象,过几天会自然停止,故多不在意。以后症状发作日渐频繁,面肌抽搐的程度逐渐加重,抽搐时间逐渐延长,而间隔时间逐渐缩短,并且向下延至口角,甚至颈上部的肌肉也随之抽搐。当情绪激动时,抽搐更为频繁严重。病程长、症状重者可使眼裂变小,影响视物、看书;另外由于频繁的面肌抽搐,致使患者口眼歪斜,而不愿与人接触,影响患者的社交和工作,病人思想负担较重。面肌抽搐与面神经有关,人的面神经左右各一,自脑干发出,到面部后分成五个大支,分布于面部两侧支配面部肌肉的运动。正常状态时,面神经是受大脑支配的,所以面部的运动是随意的,可控制的,不会出现不自主的抽搐。 Hemifacial spasm (also known as hemifacial spasm, facial spasms) is an involuntary painless paroxysmal convulsion of facial muscles. At first, the lower eyelid or upper eyelid appear beating. Many patients think that eyelid jump is a common phenomenon, a few days will naturally stop, so many do not mind. After the onset of symptoms more frequently, the degree of facial muscle twitching gradually aggravate, seizures gradually extended, while the interval gradually shortened, and down to the mouth, and even the upper neck muscles also convulsions. Convulsions are more frequent and severe when emotionally charged. Long course of the disease, severe symptoms can make small fissure, affecting the visual material, reading; also due to frequent facial muscle twitching, resulting in patients with Kouyanwaixie, but do not want to contact with others, affecting the patient’s social and work, the patient’s mental burden than weight. Facial muscle twitching and facial nerve, human facial nerve left and right one, issued from the brainstem, divided into five after the face of the big branch, distributed in the facial muscles on both sides of the domination. Normal state, the facial nerve is dominated by the brain, so facial movements are free and can be controlled, there will be involuntary twitching.