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運動終板(motor end-plate),是運動神經元軸突末梢骨骼肌細胞相鄰的功能性構造。運動神經元的軸突抵達所支配的骨骼肌時失去髓鞘,其軸突反覆分支,每一分支形成葡萄狀膨大,與一條骨骼肌纖維接觸,形成化學突觸連線,連線處呈橢圓形板狀膨大,稱為運動終板,也叫神經-肌連線。突觸前部的軸突末梢會釋放乙酰胆碱神經傳導物質,引起骨骼肌收縮。

运动终板

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