抽搐是指全身或局部骨骼肌群异常的不自主的收缩，并引起关节运动，多为全身、对称性。其表现形式可以是强直性（持续肌肉收缩）、阵挛性（断续性肌肉收缩）和混合性（先后出现强直性和阵挛性肌肉收缩）。抽搐可起自肌肉、周围神经任何部位的障碍。抽搐可分为全身性抽搐（为全身骨骼肌收缩）和局限性抽搐（为躯体或颜面某一局部的连续性抽动）。“,”On twitch is refers to systemic or local skeletal muscle group abnormal involuntary contraction, and cause joint movement, systemic, symmetry. The form can be tonic (sustained muscle contraction),clonic (intermittent muscle contraction) and mixed (has a tonic and clonic muscle contraction). Tic can since any part of muscle and peripheral nerve disorders. Seizures can be divided into generalized convulsions (systemic skeletal muscle contraction) and limitations (for continuous convulsions tic body or face a local).