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眼肌电图(electromyography)是眼科一种新检查方法,可用于生理病理研究和临床诊疗工作。(1)生理:肌肉的基本功能单位是运动单位,由一根神经及共支配的肌肉组成。眼外肌运动较灵巧,每根神经只支配5-10根肌肉纤维(躯干肌一般为100-150根)。肌纤维收缩时产生电流,可为电极所接受。同一肌肉内不同部位的电流可有很大差异。眼肌电图的特点是电位幅度小、时间短、频率高,电位通常在600微伏以下,时间为1.5毫秒,频率可达每秒200次。(躯干肌的电位为3—4毫伏,时间4-
Eye electromyography (electromyography) is a new method of ophthalmology, can be used for physiological and pathological research and clinical diagnosis and treatment. (1) Physiology: The basic function unit of muscle is a unit of movement composed of a nerve and a total of dominated muscles. Extraocular muscle movement more dexterous, each nerve only dominates 5-10 muscle fibers (trunk muscle is generally 100-150 root). Muscle fibers produce current when contracted, acceptable for the electrodes. The current in different parts of the same muscle can vary widely. Ocular electromyogram is characterized by small amplitude, short time, high frequency, the potential is usually below 600 micro-volts, the time is 1.5 milliseconds, the frequency of up to 200 times per second. (Trunk muscle potential 3-4 mV, time 4-