Modulations of interlimb and intralimb cutaneous reflexes during simultaneous arm and leg cycling in humans
Modulations of interlimb and intralimb cutaneous reflexes during simultaneous arm and leg cycling in humans
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DOI：
10.1016/j.clinph.2006.03.005
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发表时间：
2006-06-01
影响因子：
4.7
通讯作者：
Komiyama, Tomoyoshi
中科院分区：
文献类型：
--
作者：
Sakamoto, Masanori;Endoh, Takashi;Komiyama, Tomoyoshi
目的：我们调查到什么程度intralimb和interlimb皮肤反射的改变，同时进行手臂和腿部自行车（AL自行车）在不同的运动学和姿势conditions.Methods：11名受试者进行AL自行车的条件下，其中手臂和腿部曲柄同侧的刺激侧同步（同相循环）或异步（反相循环），而坐着或站着。刺激桡浅神经或腓浅神经（2.0-2.5倍辐射阈值，5个脉冲，频率333 Hz）后，在4个不同的踏板位置记录上下肢12块肌肉的皮反射。皮肤反射的峰值潜伏期为80-120 ms，然后analysed.Results：臂和腿肌肉的interlimb和intralimb皮肤反射的幅度显着调制取决于曲柄位置的相关肢体（相位依赖性调制）。在大多数肌肉静态收缩过程中观察到皮肤反射和背景EMG的幅度之间的显着相关性，但在AL循环（任务依赖性调制）。在同相和反相AL循环期间获得的肢体内和肢体间皮肤反射的幅度比较中没有发现显著差异。定性地，在坐着或站着的AL循环期间获得了相同的结果。此外，在同相，反相和孤立的手臂骑自行车在手臂肌肉的皮肤反射的调制是相同的。结果是相同的腿muscle.Conclusions：皮肤反射在手臂肌肉的影响很小的节奏运动的腿，反之亦然，在AL循环。这是可能的，控制interlimb反射的神经元组件是松散耦合在AL骑自行车，而坐着或standing.Significance：我们的研究结果提供了一个更好的理解，在有节奏的运动中的上肢和下肢之间的协调。(c)2006年国际临床神经生理学联合会。由Elsevier爱尔兰有限公司出版。保留所有权利。
Objective: We investigated to what extent intralimb and interlimb cutaneous reflexes are altered while simultaneously performing arm and leg cycling (AL cycling) under different kinematic and postural conditions.Methods: Eleven subjects per-formed AL cycling under conditions in which the arm and leg crank ipsilateral to the stimulation side were moved synchronously (in-phase cycling) or asynchronously (anti-phase cycling) while sitting or standing. Cutaneous reflexes following superficial radial or superficial peroneal nerve stimulation (2.0-2.5 times radiating threshold, 5 pulses at 333 Hz) were recorded at 4 different pedal positions from 12 muscles in the upper and lower limbs. Cutaneous reflexes with a peak latency of 80-120 ms were then analyzed.Results: The magnitude of interlimb and intralimb cutaneous reflexes in the arm and leg muscles was significantly modulated depending on the crank position for the relevant limb (phase-dependent modulation). A significant correlation between the magnitude of the cutaneous reflex and background EMG was observed in the majority of muscles during static contraction, but not during AL cycling (task-dependent modulation). No significant difference was found in comparisons of the magnitude of intralimb and interlimb cutaneous reflexes obtained during in- and anti-phase AL cycling. Qualitatively, the same results were obtained during AL cycling while sitting or standing. In addition, the modulation of cutaneous reflexes in arm muscles was identical among in-phase, anti-phase and isolated arm cycling. Results were the same for leg muscles.Conclusions: Cutaneous reflexes in arm muscles are little influenced by rhythmic movement of the legs and vice versa during AL cycling. It is likely that neural components that control interlimb reflexes are loosely coupled during AL cycling while sitting or standing.Significance: Our results provide a better understanding of the coordination between the upper and lower limbs during rhythmic movement. (c) 2006 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.