50年代以前,普遍认为躯体运动传导路包括锥体系(中央前回发出,管理随意运动)和锥体外系(皮质各处发出,经许多“转接”才达下运动神经元,调节肌张力和协调肌群间的运动)。以后许多资料表明两者在形态、功能以至临床表现等均难以截然分开,而且主要都是通过复杂的环路系统起作用,下行纤维 Before the 1950s, it was generally accepted that the somatic motor conduction path included the cone system (issued by the central front back, managed to move at random) and the extrapyramidal system (emitted throughout the cortex, reaching motor neurons, regulating muscle tension and coordination after many “transitions” Muscle movement between groups). Many data show that after the two in form, function and clinical manifestations are difficult to be completely separated, and mainly through a complex loop system function, the downlink fiber