Tan U
Atatürk University, Medical Faculty, Institute of Physiology, Erzurum, Turkey.
Int J Neurosci. 1990 Aug;53(2-4):63-8. doi: 10.3109/00207459008986588.
The claim that there is no consistent inhibition of the H-reflex from the dominant leg was examined and rejected. Hand preference was assessed by the Edinburgh Inventory, and hand skill by the peg moving task. It was re-established that there is an inverse relationship between hand skill and the excitability of motoneurons innervating the postural soleus muscle in right-handed subjects without familial sinistrality. There was no significant difference between the recovery curves from the right and left sides in subjects with familial sinistrality. There was a positive linear correlation between the asymmetry index for hand skill greater than zero (right-hand dominance) and the asymmetry index for the H-reflex recovery curve greater than zero (left dominance in motoneuronal excitability). It was concluded that there is indeed a spinal motor asymmetry in postural leg muscles related to handedness.
关于优势腿不存在对H反射的持续抑制这一说法已被研究并否定。用爱丁堡手部偏好量表评估利手情况，并用移 peg 任务评估手部技能。再次证实，在无家族性左利手的右利手受试者中，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。有家族性左利手的受试者左右两侧的恢复曲线之间无显著差异。手部技能不对称指数大于零（右利手优势）与H反射恢复曲线不对称指数大于零（运动神经元兴奋性左优势）之间存在正线性相关。得出的结论是，与利手相关的姿势性腿部肌肉确实存在脊髓运动不对称。
