Locomotor-like leg movements evoked by rhythmic arm movements in humans.
Locomotor-like leg movements evoked by rhythmic arm movements in humans.
复制标题
DOI：
10.1371/journal.pone.0090775
复制
发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Lacquaniti F
中科院分区：
文献类型：
--
作者：
Sylos-Labini F;Ivanenko YP;Maclellan MJ;Cappellini G;Poppele RE;Lacquaniti F
在人类的两足运动中，上肢的运动常常与下肢的运动相结合。然而，目前尚不清楚上肢和下肢之间的功能耦合是否是双向的，即手臂运动是否会影响腰骶运动回路。在这里，我们测试了自愿有节奏的手臂运动对下肢的影响。参与者水平侧躺，每条腿都悬挂在卸载的外骨骼中。他们在头顶的跑步机上移动手臂，就像用手走路一样。在58%的参与者中，前后方向的手行走导致了腿部明显的类似运动的运动。我们进一步定量地调查了一部分有反应的受试者的反应。我们发现腿近端肌肉的肌电图（EMG）活动在每个周期中被调节，其时间与正常运动相似。腿部的运动和肌电振荡频率通常不同于手臂的振荡频率。手走的效果是方向特异性的，因为中侧臂运动不会引起明显的腿部踏步。通过外部施加躯干运动和生物力学建模，我们排除了与手行走相关的腿部运动主要是由于躯干振荡的机械传递。与手走相关的腿筋肌的肌电图活动通常在腿部运动被实验者暂时阻断或手臂运动结束后仍在继续。目前的结果加强了手臂和腿之间存在功能性神经耦合的观点。
Motion of the upper limbs is often coupled to that of the lower limbs in human bipedal locomotion. It is unclear, however, whether the functional coupling between upper and lower limbs is bi-directional, i.e. whether arm movements can affect the lumbosacral locomotor circuitry. Here we tested the effects of voluntary rhythmic arm movements on the lower limbs. Participants lay horizontally on their side with each leg suspended in an unloading exoskeleton. They moved their arms on an overhead treadmill as if they walked on their hands. Hand-walking in the antero-posterior direction resulted in significant locomotor-like movements of the legs in 58% of the participants. We further investigated quantitatively the responses in a subset of the responsive subjects. We found that the electromyographic (EMG) activity of proximal leg muscles was modulated over each cycle with a timing similar to that of normal locomotion. The frequency of kinematic and EMG oscillations in the legs typically differed from that of arm oscillations. The effect of hand-walking was direction specific since medio-lateral arm movements did not evoke appreciably leg air-stepping. Using externally imposed trunk movements and biomechanical modelling, we ruled out that the leg movements associated with hand-walking were mainly due to the mechanical transmission of trunk oscillations. EMG activity in hamstring muscles associated with hand-walking often continued when the leg movements were transiently blocked by the experimenter or following the termination of arm movements. The present results reinforce the idea that there exists a functional neural coupling between arm and legs.
登录
查看更多内容
影响因子：
2
作者：
Debaere, F;Van Assche, D;Swinnen, SP
通讯作者：
Swinnen, SP
DOI：
10.1111/j.1748-1716.1965.tb04069.x
发表时间：
1965-01-01
期刊：
ACTA PHYSIOLOGICA SCANDINAVICA
影响因子：
--
作者：
BALLESTEROS, ML;BUCHTHAL, F;ROSENFALCK, P
通讯作者：
ROSENFALCK, P
影响因子：
2.9
作者：
DUYSENS, J;PEARSON, KG
通讯作者：
PEARSON, KG
影响因子：
3.4
作者：
Cazalets, JR;Bertrand, S
通讯作者：
Bertrand, S
DOI：
10.1076/ejom.36.4.293.5820
发表时间：
1998-12-01
期刊：
EUROPEAN JOURNAL OF MORPHOLOGY
影响因子：
--
作者：
Duysens, J;van Wezel, BMH;Kooloos, JGM
通讯作者：
Kooloos, JGM