Execution of natural manipulation in the air enhances the beta-rhythm intermuscular coherences of the human arm depending on muscle pairs.
Execution of natural manipulation in the air enhances the beta-rhythm intermuscular coherences of the human arm depending on muscle pairs.
复制标题
在空气中执行自然操纵可以增强人臂的β-节奏肌间一致性，具体取决于肌肉对。
DOI：
10.1152/jn.00421.2021
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发表时间：
2022
影响因子：
2.5
通讯作者：
Ariyasu R
中科院分区：
文献类型：
--
作者：
Ohtsuka H;Nakajima T;Komiyama T;Suzuki S;Irie S;Ariyasu R
在空气中的自然操作任务包括两个运动学组件：一个抓握组件，激活手部肌肉，和一个提升组件，激活近端肌肉。然而，目前还不清楚是否同步电机命令的手/近端手臂肌肉分散控制在任务期间。因此，我们研究了肌间连贯性是如何调制的肌肉组合在抓地力和升降机（G&L）的任务。记录肱二头肌（BB）、肱三头肌（TB）、指浅屈肌（FDS）和指总伸肌（EDC）的肌电图（EMG）。参与者被要求保持G&L任务，包括一个小立方体盒子，拇指，食指和中指。因此，我们发现，在G&L期间，BB-TB、BB-FDS和TB-EDC对中的β节律相干性（15-35 Hz）显著大于两个目标肌肉共同收缩的单独任务期间的β节律相干性，但BB-EDC、TB-FDS和FDS-EDC（任务和肌肉对特异性）则没有。在肌内EMG记录中也观察到β节律相干性的这些增加。此外，从几个模拟G&L任务的执行结果显示，分离的任务相关的运动信号和运动信号/感觉的指尖或物体负载之间的组合有微小的贡献增加的一致性。这些结果表明，在G&L过程中，中枢神经系统根据肌肉对调节对运动神经元的同步驱动，并且任务中触摸/物体负载和运动信号的感觉的多重组合效应促进了这些对的同步。新&值得注意的是，空气中的自然操作包括两个运动学组件：抓握，激活手部肌肉，以及举起，激活近端肌肉。我们表明，在维持对象操作在空气中的中枢神经系统调节同步驱动到人类运动神经元池取决于手/近端肌肉对和触摸/对象负载和电机信号的感觉在任务中的多重组合效应促进这些对的同步。
Natural manipulation tasks in air consist of two kinematic components: a grasping component, with activation of the hand muscles, and a lifting component, with activation of the proximal muscles. However, it remains unclear whether the synchronized motor commands to the hand/proximal arm muscles are divergently controlled during the task. Therefore, we examined how intermuscular coherence was modulated depending on the muscle combinations during grip and lift (G&L) tasks. Electromyograms (EMGs) were recorded from the biceps brachii (BB), triceps brachii (TB), flexor digitorum superficialis (FDS), and extensor digitorum communis (EDC) muscles. The participants were required to maintain G&L tasks involving a small cubical box with the thumb and index and middle fingers. Consequently, we found that the beta-rhythm coherence (15–35 Hz) in BB-TB, BB-FDS, and TB-EDC pairs during G&L was significantly larger than that during the isolated task with cocontraction of the two target muscles but not BB-EDC, TB-FDS, and FDS-EDC (task and muscle pair specificities). These increases in beta-rhythm coherence were also observed in intramuscular EMG recordings. Furthermore, the results from the execution of several mimic G&L tasks revealed that the separated task-related motor signals and combinations between the motor signals/sensations of the fingertips or object load had minor contributions to the increase in the coherence. These results suggest that during G&L the central nervous system regulates synchronous drive onto motoneurons depending on the muscle pairs and that the multiple combination effect of the sensations of touch/object load and motor signals in the task promotes the synchrony of these pairs.NEW & NOTEWORTHYNatural manipulation in air consists of two kinematic components: grasping, with activation of hand muscles, and lifting, with activation of proximal muscles. We show that during the maintenance of object manipulation in air the central nervous system regulates the synchronous drive onto human motoneuron pools depending on the hand/proximal muscle pairs and that the multiple combination effect of the sensations of touch/object load and motor signals in the task promotes the synchrony of these pairs.