Common Neural Input within and across Lower Limb Muscles: A Preliminary Study
Common Neural Input within and across Lower Limb Muscles: A Preliminary Study
复制标题
下肢肌肉内部和之间的常见神经输入：初步研究
DOI：
10.1109/embc46164.2021.9630141
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Noah Rubin, Wentao Liu
中科院分区：
文献类型：
--
作者：
Noah Rubin, Wentao Liu
运动单元（MU）是运动控制的基本单元。 MU 同步已被评估，以识别运动协调过程中神经回路中的常见输入。最近的研究比较了下肢肌肉之间的常见输入，但需要进一步研究来比较肌肉内和不同肌肉对的 MU 之间的 MU 的常见输入。这项初步研究的目的是表征三个肌肉群中 MU 的常见输入水平：肌肉内的 MU、双边同源对之间的 MU 以及主动/拮抗肌对之间的 MU。为了实现这一目标，在双侧踝关节背屈和跖屈期间记录左右胫骨前肌（RTA、LTA）和腓肠肌（RGA、LGA）的表面肌电图（EMG）。将 EMG 分解为主动 MU 放电后，我们对每个肌群在 beta (13-30 Hz) 和 gamma (30-60 Hz) 频段的复合 MU 尖峰训练 (CST) 进行了相干性分析。我们的结果表明，肌肉内的 MU 具有最高水平的共同输入，而双侧和主动/拮抗肌对的共同输入水平分别降低。此外，每个肌肉群在 β 带和 γ 带之间表现出相似的共同输入水平。这项工作可能提供一种揭示下肢跨运动任务的功能协调机制的方法。
Motor units (MUs) are the basic unit of motor control. MU synchronization has been evaluated to identify common inputs in neural circuitry during motor coordination. Recent studies have compared common inputs between muscles in the lower limb, but further investigation is needed to compare common inputs to MUs both within a muscle and between MUs of different muscle pairs. The goal of this preliminary study was to characterize levels of common inputs to MUs in three muscle groups: MUs within a muscle, between bilateral homologous pairs, and between agonist/antagonist muscle pairs. To achieve this, surface electromyography (EMG) was recorded during bilateral ankle dorsiflexion and plantarflexion on the right and left tibiales anterior (RTA, LTA) and gastrocnemii (RGA, LGA) muscles. After decomposing EMG into active MU firings, we conducted coherence analyses of composite MU spike trains (CSTs) in each muscle group in both the beta (13-30 Hz) and gamma (30-60 Hz) frequency bands. Our results indicate MUs within a muscle have the greatest levels of common input, with decreasing levels of common input to bilateral and agonist/antagonist muscle pairs, respectively. Additionally, each muscle group exhibited similar levels of common input between the beta and gamma bands. This work may provide a way to unveil mechanisms of functional coordination in the lower limb across motor tasks.
研究人类自愿等长收缩过程中运动神经元常见突触输入的频率内容。
DOI：
--
发表时间：
1993
期刊：
Journal of Physiology
影响因子：
--
作者：
S. Farmer;F. Bremner;D. Halliday;J. Rosenberg;J. Stephens
通讯作者：
J. Stephens
影响因子：
2.5
作者：
De Luca, Carlo J.;Adam, Alexander;Nawab, S. Hamid
通讯作者：
Nawab, S. Hamid