Tan U
Atatürk University, Medical Faculty, Erzurum, Turkey.
Int J Neurosci. 1990 Mar;51(1-2):25-34. doi: 10.3109/00207459009000505.
The claim that there is not a consistent inhibition of the H-reflex from the dominant leg was examined and rejected. It was re-established that there is an inverse relationship between hand skill and the excitability of motoneurons innervating the postural soleus muscle in left-handed subjects. In left-handers with significantly better left-hand skill, the height of the H-reflex recovery curve was significantly higher on the right leg (nondominant) than the left leg (dominant). There was a positive linear correlation between the asymmetries of hand skill greater than zero (better left-hand skill) and the H-reflex recovery curves from the right and left legs greater than zero (right dominance in reflex excitability). In left-handers with no significant difference between the right- and left-hand skills, there was no significant difference between the mean recovery curves from the right and left legs for the interstimulus intervals from 40 to 100 ms; the height of the left recovery curve was found to be significantly higher than the height of the right recovery curve for the interstimulus intervals from 150 to 1000 ms. It was concluded that there is close relationship between hand skill and motoneuronal excitability from right and left soleus muscle with regard to support and operative functions of legs in left-handers.
关于优势腿H反射不存在持续抑制的说法经过检验后被否定。研究再次证实，在左利手受试者中，手部技能与支配姿势性比目鱼肌的运动神经元兴奋性之间存在反比关系。在左手技能明显更好的左利手者中，右侧腿（非优势腿）的H反射恢复曲线高度显著高于左侧腿（优势腿）。手部技能不对称性大于零（左手技能更好）与左右腿H反射恢复曲线不对称性大于零（反射兴奋性右侧占优）之间存在正线性相关。在左右手技能无显著差异的左利手者中，对于40至100毫秒的刺激间隔，左右腿平均恢复曲线无显著差异；对于150至1000毫秒的刺激间隔，发现左侧恢复曲线高度显著高于右侧恢复曲线高度。研究得出结论，就左利手者腿部的支撑和操作功能而言，手部技能与左右比目鱼肌运动神经元兴奋性之间存在密切关系。
