Functional, anatomical, and neurophysiological study of human upper limb muscles

人体上肢肌肉的功能、解剖学和神经生理学研究

基本信息

批准号：
07670008
负责人：
NAITO Akira
金额：
$ 1.54万
依托单位：
Shinshu University School of Medicine
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07670008/
关键词：
human upper limb muscles functional electrical stimulation (FES)neuromuscular stimulation data neural connection group Ia fibers synapse post-stimulus time-histogram (PSTH)motor unit ヒト肢筋 post-stimulus time-histogrnm(PSTH)ヒト上肢多チャ

项目摘要

1.Functional and anatomical studies of the elbow flexors.Forearm supination produced by electrical activation of two elbow flexors (biceps brachii : BB,brachioradialis : BR) was examined in healthy human subjests. The muscles were activated separately by electrical stimulation through wire electrodes with a computer-controlled multi-channel stimulator. Activation of BB induced flexion and supination and that of BR induced flexion. Activation of BR with adequate stimulation intensity provided holding of elbow with maintaining the forearm prone. In this situation, additional activation of BB accompanied with a decrease of stimulation intensity for BR resulted in supination without flexion. Since the triceps brachii showed no contraction throughout the motion, it supports a theory that compensatory changes of activities among the flexors permit BB to work for supination without flexion.2.Neurophysiological studies of the muscles crossing the elbow joint.Neural projections among the biceps brachii (BB), brachioradialis (BR), and pronator teres (PT) in humans were studied using the method of post-stimulus time histograms of voluntarily activated motor units. Electrical conditioning stimuli to the BB,BR and PT nerves resulted in inhibition in motor units of BR and PT,of BB and PT,and of BB,respectively. The inhibition was induced with the stimulation intensity well below the motor threshold. The latency of the inhibition was 0-2ms longer than that of the homonymous facilitation. These findings suggest that inhibitiory projections between BB and BR,and between BB and PT,and from BR to PR exist and the inhibition is mediated through group I afferents and oligo (di or tri) -synaptic linkage.

1.肘部屈肌的功能性和解剖学研究。通过在健康的人类副jest中检查了两个肘部屈肌（二头肌屈曲：BB，Brachioradialis：br）产生的forearm supination。通过通过计算机控制的多通道刺激器通过电极电极通过电刺激分别激活肌肉。 BB诱导的屈曲和旋转的激活以及BR诱导的屈曲的激活。用足够的刺激强度激活BR提供了肘部的握持，并保持前臂容易发生。在这种情况下，BB的额外激活伴随着BR刺激强度的降低，导致旋转无屈曲。 Since the triceps brachii showed no contraction throughout the motion, it supports a theory that compensatory changes of activities among the flexors permit BB to work for supination without flexion.2.Neurophysiological studies of the muscles crossing the elbow joint.Neural projections among the biceps brachii (BB), brachioradialis (BR), and pronator teres (PT) in humans were studied using the method of post-stimulus自愿激活电机单元的时间直方图。对BB，BR和PT神经的电调理刺激分别导致BB和PT的运动单位，BB和PT和BB的抑制作用。用刺激强度远低于运动阈值，诱导了抑制作用。抑制的潜伏期比同义促进的时间长0-2m。这些发现表明，BB和BR之间以及BB和PT之间的抑制投影以及从BR到PR的存在，并且抑制作用是通过I组和Oligo（DI或TRI） - 突触链接介导的。