指屈肌主动不足条件下屈指运动时神经肌肉的调控

doi:10.3969/j.issn.1006-9771.2021.09.017

Abstract

Abstract:

Objective To observe the characteristics of neuromuscular modulation for fingers flexion under the condition of initiative inadequate of flexor digitorum.Methods In March, 2019, twelve healthy girls in college were recruited. They were measured strength of grip of right hands with the wrist on neutral position and maximum flexion, and finished 15 times of fingers flexion under 50% maximal voluntary isometric contraction (MVC). The surface electromyography (sEMG) and electroencephalography (EEG) were recorded synchronously, and corticomuscular coherence (CMC) was measured.Results The strength of grip decreased as wrist maximum flexion compared with that on neutral position (t = 5.757, P < 0.001), as well as mean power frequency of sEMG (t = -2.152, P = 0.043). For dynamic contraction, sEMG amplitude of flexor digitorum was higher than that of extensor (t > 2.964, P < 0.01); while sEMG amplitude of flexor digitorum was more as wrist maximum flexion (t = 4.135, P < 0.001), as well as the CMC (t > 2.203, P < 0.05).Conclusion Wrist maximum flexion may induce initiative inadequate of flexor digitorum. Cerebral related areas are activated as finger flexion under the condition of initiative inadequate, maybe a kind of compensation.

Key words: flexor digitorum, initiative inadequate, neuromodulation, surface electromyography, electro-encephalography, corticomuscular coherence

ZHANG Jing,GUO Feng. Neuromodulation for Flexion of Fingers under Initiative Inadequate of Flexor Digitorum[J]. 《Chinese Journal of Rehabilitation Theory and Practice》, 2021, 27(9): 1104-1109.

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References 22

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部位	n	NDS	IDS	t值	P值
指屈肌	12	7632.5±1405.5	8840.0±1513.6	1.909	0.098
指伸肌	12	7642.3±1323.3	8037.4±1015.4	1.168	0.276
t值		0.014	0.271
P值		0.988	0.798

次数	n	NDS	IDS	t值	P值
1	12	53.3±9.5	42.2±14.3	2.240	0.036
2	12	52.5±9.1	48.2±15.2	0.841	0.410
3	12	51.5±10.0	44.1±13.2	1.548	0.136
4	12	50.2±10.7	45.4±14.6	0.919	0.368
5	12	50.6±12.0	46.2±11.6	0.913	0.371
6	12	51.4±10.5	46.8±11.8	1.009	0.324
7	12	48.6±10.6	47.0±14.5	0.309	0.761
8	12	52.2±10.3	43.2±16.3	1.617	0.120
9	12	49.5±12.9	43.7±11.1	1.181	0.250
10	12	53.4±11.4	44.8±14.5	1.615	0.121
11	12	50.0±10.5	43.8±12.4	1.322	0.200
12	12	49.7±7.2	44.3±13.1	1.251	0.224
13	12	46.7±7.2	45.3±14.0	0.308	0.761
14	12	49.0±6.6	44.5±13.7	1.025	0.316
15	12	49.6±7.7	45.9±12.6	0.868	0.395
F值		0.419	0.166
P值		0.967	1.000

部位	n	NDS	IDS	t值	P值
指屈肌	12	25.1±3.2	49.3±4.9	4.135	< 0.001
指伸肌	12	12.1±3.0	12.4±3.1	-0.069	0.945
t值		2.964	6.364
P值		0.007	< 0.001

条件	Cz	C1	C3
NDS	0.08±0.05	0.10±0.06	0.11±0.06
IDS	0.14±0.08	0.16±0.07	0.18±0.07
t值	2.203	2.254	2.630
P值	0.038	0.035	0.015

Neuromodulation for Flexion of Fingers under Initiative Inadequate of Flexor Digitorum

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