Monosynaptic facilitation mediated by group Ia afferents from deltoid to biceps brachii motoneurons in humans
Monosynaptic facilitation mediated by group Ia afferents from deltoid to biceps brachii motoneurons in humans
复制标题
人类从三角肌到肱二头肌运动神经元的 Ia 组传入神经介导的单突触促进
DOI:
10.1007/s00221-022-06332-8
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发表时间:
2022
影响因子:
2
通讯作者:
Naito Akira
中科院分区:
文献类型:
--
作者:
Yoshimoto Takuya;Nito Mitsuhiro;Hashizume Wataru;Miyasaka Takuji;Shindo Masaomi;Naito Akira
Effects of low-threshold afferents from the anterior (DA), middle (DM) and posterior parts of the deltoid (DP) on the excitability of biceps brachii (BB) motoneurons in humans were studied. We evaluated the effects on individual motor units and motoneuron pool using a post-stimulus time-histogram (PSTH) and an electromyogram-averaging (EMG-A) methods, respectively, in 11 healthy human subjects. Electrical conditioning stimulation was delivered to the axillary nerve branch innervating DA (DA nerve), DM (DM nerve) and DP (DP nerve) with the intensity below the motor threshold. In the PSTH study, stimulation to the DA, DM and DP nerves produced a significant peak (facilitation) in 26/40 (65%), 28/47 (59%) and 0/32 (0%) of BB motor units, respectively. Since the central latency of the facilitation from the DA and DM nerves was 0.1 ± 0.3 and 0.1 ± 0.2 ms (mean ± S.D.) longer than that of the homonymous monosynaptic Ia facilitation of BB, respectively, the facilitation thus being compatible with monosynaptic path. In the EMG-A study, stimulation to the DA and DM nerves produced a significant peak (facilitation) for the BB motoneuron pool in all the subjects, whereas stimulation to the DP nerve produced no effect on BB. The facilitation diminished by vibration stimulation, and the suppression lasted for 30–40 min after removal of the vibration. Therefore, group Ia afferents should be responsible for the facilitation. These findings suggest that monosynaptic facilitation mediated by group Ia afferents from the DA and DM nerves to BB motoneurons exists in humans.
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DOI:
10.2490/jjrm1963.11.41
发表时间:
1974
期刊:
影响因子:
--
作者:
R. Sugahara
通讯作者:
R. Sugahara
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
E. Pierrot‐Deseilligny;D. Burke
通讯作者:
D. Burke
影响因子:
2
作者:
A. Créange;M. Faist;R. Katz;A. Pénicaud
通讯作者:
A. Pénicaud
影响因子:
3
作者:
Petersen, N;Morita, H;Nielsen, J
通讯作者:
Nielsen, J
影响因子:
0.9
作者:
Nakano, Haruki;Miyasaka, Takuji;Naito, Akira
通讯作者:
Naito, Akira