Aiello I, Rosati G, Sau G F, Patraskakis S, Bissakou M, Traccis S
Neurological Clinic, Sassari University, Italy.
Exp Neurol. 1988 Jul;101(1):41-9. doi: 10.1016/0014-4886(88)90063-5.
The asymmetric tonic neck reflexes on upper limbs in man have been studied by analyzing the changes in flexor carpi radialis H-reflex amplitude following body rotation around the longitudinal axis with a stationary head. In eight normal subjects 15 consecutive H-reflexes were recorded from the right flexor carpi radialis muscle at each test position. The tested body rotation angles were 4, 8, 12, 16, and 20 degrees both to the right side and to the left side. Before and after each test position 15 H-reflexes were recorded at 0 degrees. The linear correlation coefficient r, computed by plotting the H-reflex amplitudes against the relevant body rotation angles, was significant in all the subjects. The FCR H-reflex amplitude increased with contralateral body rotation (i.e., ipsilateral head rotation) and decreased with ipsilateral body rotation (i.e., contralateral head rotation). It has been suggested that these findings, which are opposite to those observed in animal experiments, are the consequence of the acquired antigravity function of upper limb flexor muscles in man.
通过分析在头部固定的情况下身体绕纵轴旋转时桡侧腕屈肌H反射幅度的变化，对人体上肢的非对称紧张性颈反射进行了研究。在8名正常受试者中，在每个测试位置从右侧桡侧腕屈肌连续记录15次H反射。测试的身体旋转角度为右侧和左侧的4、8、12、16和20度。在每个测试位置之前和之后，在0度记录15次H反射。通过将H反射幅度与相关身体旋转角度作图计算出的线性相关系数r在所有受试者中均具有显著性。桡侧腕屈肌H反射幅度随对侧身体旋转（即同侧头部旋转）而增加，随同侧身体旋转（即对侧头部旋转）而降低。有人提出，这些与动物实验中观察到的结果相反的发现，是人类上肢屈肌后天获得的抗重力功能的结果。
