Marsden C D, Merton P A, Morton H B, Adam J
Brain. 1977 Sep;100(3):503-26. doi: 10.1093/brain/100.3.503.
Lesions of the sensorimotor cortex, or of the capsular pathways beneath it, caused (with one exception out of 14 cases) diminution "r loss of the servo responses in the thumb, which are based on the long-latency stretch reflex. When not absent the long-latency stretch reflex tended to be late in onset. When absent it was often replaced by a large early reflex response at spinal latency. In general the results are consistent with the transcortical theory of the long-latency stretch reflex for the thumb, but, in detail, they indicate that the theory will require elaboration.
感觉运动皮层或其下方的囊通路损伤（14例中有1例除外）导致基于长潜伏期牵张反射的拇指伺服反应减弱或丧失。当长潜伏期牵张反射未消失时，其起始往往延迟。当它不存在时，常被脊髓潜伏期的大的早期反射反应所取代。总体而言，结果与拇指长潜伏期牵张反射的经皮质理论一致，但具体而言，它们表明该理论需要进一步完善。
