Burke J R, Koceja D M, Kamen G
Department of Kinesiology, Indiana University, Bloomington 47405.
Int J Neurosci. 1993 Sep;72(1-2):45-58. doi: 10.3109/00207459308991622.
The purpose of this study was to determine the effects of extreme body heights on the conditioned patellar tendon reflex response in an attempt to differentiate between the contributions of supraspinal and spinal mechanisms on long-latency reflex facilitation. Unilateral and conditioned right patellar tendon reflexes were assessed in 10 extremely short males and females and 10 extremely tall males and females. The conditioning stimulus was a contralateral patellar tendon tap and the conditioning intervals were 10, 15, 25, 50, 60, 75, 100, 150, and 300 ms. There was a long-latency facilitation of quadriceps excitability beginning at the 75 ms conditioning interval regardless of the height of the subject. It is hypothesized that the similar conditioned patellar tendon recovery profiles in the extremely short subjects and the extremely tall subjects reflects the activation of a spinal polysynaptic pathway as the predominant mechanism for our long-latency reflex facilitation.
本研究的目的是确定极端身高对条件性髌腱反射反应的影响，试图区分脊髓上和脊髓机制对长潜伏期反射易化的作用。对10名极矮的男性和女性以及10名极高的男性和女性进行了单侧和条件性右髌腱反射评估。条件刺激是对侧髌腱叩击，条件间隔为10、15、25、50、60、75、100、150和300毫秒。无论受试者身高如何，从75毫秒的条件间隔开始，股四头肌兴奋性就出现了长潜伏期易化。据推测，极矮受试者和极高受试者中相似的条件性髌腱恢复曲线反映了脊髓多突触通路的激活，这是我们长潜伏期反射易化的主要机制。
