Kearney R E, Chan C W
Electroencephalogr Clin Neurophysiol. 1981 Jul;52(1):65-71. doi: 10.1016/0013-4694(81)90190-5.
Interlimb reflexes evoked by ankle displacements were studied in arm muscles of 6 normal subjects. EMGs from grastrocnemius (G), tibialis anterior (TA), biceps brachii (BB), and triceps brachii (TB) were amplified, rectified and low-pass filtered before recording. Averaging and Wiener filtering were used to detect changes in tonic EMG activity evoked by dorsiflexing or plantarflexing displacements of the ankle. A consistent pattern of response was observed in all subjects. In the leg muscles, the responses to stretch were consistent with previous reports. In the arm muscles, the response of TB was dominant. Dorsiflexing displacements of the ankle evoked a small excitation followed by a more marked decrease in TB activity but had no effect on BB. In contrast, plantarflexing displacements of the ankle resulted in a large, early period of excitation followed by a decreased level of activity in TB. A similar but smaller pattern of activity was observed in BB. It is notable that the TB responses to displacement were sizable, often modulating the tonic EMG activity by as much as 80%. Interlimb reflexes evoked by ankle displacement were larger and of shorter latency than those evoked by cutaneous electrical stimulation of the foot reported previously. This suggests that proprioceptive afferents may have stronger and more direct interlimb reflex connections than cutaneous afferents and may therefore play an important role in the coordination of movement.
在6名正常受试者的手臂肌肉中研究了踝关节位移诱发的肢体间反射。在记录之前，对腓肠肌（G）、胫前肌（TA）、肱二头肌（BB）和肱三头肌（TB）的肌电图进行放大、整流和低通滤波。使用平均法和维纳滤波来检测踝关节背屈或跖屈位移诱发的肌电图紧张性活动的变化。在所有受试者中均观察到一致的反应模式。在腿部肌肉中，对拉伸的反应与先前的报告一致。在手臂肌肉中，TB的反应占主导。踝关节背屈位移诱发了一个小的兴奋，随后TB活动更明显下降，但对BB没有影响。相反，踝关节跖屈位移导致了一个大的、早期的兴奋期，随后TB活动水平下降。在BB中观察到类似但较小的活动模式。值得注意的是，TB对位移的反应相当大，经常使肌电图紧张性活动调节多达80%。踝关节位移诱发的肢体间反射比先前报道的足部皮肤电刺激诱发的反射更大且潜伏期更短。这表明本体感觉传入纤维可能比皮肤传入纤维具有更强和更直接的肢体间反射连接，因此可能在运动协调中发挥重要作用。
