Marsden C D, Merton P A, Morton H B, Adam J
Brain. 1977 Mar;100 Pt 1:185-200. doi: 10.1093/brain/100.1.185.
Lesions of the posterior column pathways, in which muscle spindle afferents run towards the brain, are associated with loss of servo responses in the long flexor of the thumb, in the absence of motor weakness and with tendon jerks preserved. This evidence is consistent with the hypothesis that the long-latency stretch reflex (on which servo responses are based) uses a supraspinal, possibly a transcortical, reflex arc.
后柱通路的损伤与拇指长屈肌伺服反应丧失有关，在这种损伤中，肌梭传入神经向脑运行，且不存在运动无力，腱反射保留。这一证据与以下假设一致，即长潜伏期牵张反射（伺服反应基于此）使用的是脊髓以上的、可能是经皮质的反射弧。
