Distribution of heteronymous Ia facilitation and recurrent inhibition in the human deltoid motor nucleus
Distribution of heteronymous Ia facilitation and recurrent inhibition in the human deltoid motor nucleus
复制标题
人类三角肌运动核异名 Ia 促进和循环抑制的分布
DOI：
10.1007/bf00230946
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发表时间：
2004
影响因子：
2
通讯作者：
A. Pénicaud
中科院分区：
文献类型：
--
作者：
A. Créange;M. Faist;R. Katz;A. Pénicaud
在电刺激支配上肢主要肌肉的神经后，研究了支配三角肌前部的运动神经元中异源性Ia易化和异源性复发抑制的分布。来自三角肌，肱二头肌，肱三头肌和桡侧腕伸肌（ECR）肌肉的I组传入的激活导致属于三角肌前部的自发激活运动单位的发射概率的早期增加，而供应三角肌，肱三头肌，ECR和桡侧腕屈肌（FCR）肌肉的运动轴突的激活导致发射概率的早期和长期的减少。没有效果被认为是激活组I传入和运动轴突包含在尺神经。早期易化的特征表明，它至少部分是由于异源性Ia单突触连接，而这些持久的抑制表明，它至少部分是由于异源性复发抑制。他们的分布模式进行了讨论方面的人类三角肌的功能作用。
SummaryDistribution of heteronymous Ia facilitation and of heteronymous recurrent inhibition in motoneurones innervating the anterior part of the deltoid muscle were investigated in normal human subjects following electrical stimulation of the nerves innervating the main muscles of the upper limb. Activation of group I afferents originating from deltoid, biceps, triceps and extensor carpi radialis (ECR) muscles resulted in an early increase in firing probability of voluntarily activated motor units belonging to the anterior part of the deltoid muscle whereas activation of motor axons supplying deltoid, triceps, ECR and flexor carpi radialis (FCR) muscles resulted in an early and long-lasting decrease in firing probability. No effect was seen following activation of group I afferents and motor axons contained in the ulnar nerve. The characteristics of the early facilitation suggest that it is at least partly due to heteronymous Ia monosynaptic connections while these of the long-lasting inhibition suggest that it is at least partly due to heteronymous recurrent inhibition. Their patterns of distribution are discussed with regards to the functional role of the human deltoid.