《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2022, Vol. 28 ›› Issue (12): 1473-1477.doi: 10.3969/j.issn.1006-9771.2022.12.013

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Characteristics of surface electromyography of muscles in stroke patients with lower limb spasticity under isokinetic passive movement

GUO Jingwei1,GE Ruidong1(),BAI Shuo2,WANG Jiaxi1,WU Shuai3,WANG Le4   

  1. 1. Rehabilitation Medicine Department, China-Japan Friendship Hospital, Beijing 100029, China
    2. Rehabilitation Medicine Department, Taiyanggong Community Health Service Center, Beijing 100028, China
    3. Department of Chinese Medicine, Yizhuang Hospital, Beijing 100176, China
    4. Beijing University of Chinese Medicine, Beijing 100029, China
  • Received:2022-04-21 Revised:2022-08-24 Published:2022-12-25 Online:2023-01-10
  • Contact: GE Ruidong E-mail:geruidong@126.com
  • Supported by:
    China-Japan Friendship Hospital-level Research Project (Youth)(2015-2-QN-29);China-Japan Friendship Hospital-level Research Project (General)(2013-MS-44);Central Health Research Project(2020YB25)

Abstract:

Objective To investigate the characteristics of surface electromyography (sEMG) of muscles in stroke patients with lower limb spasticity.

Methods From October, 2016 to July, 2020, a total of 32 stroke patients with hemiplegia and eleven healthy subjects (control group) were selected. The patients were divided into modified Ashworth Scale (MAS) 0 group (n = 13), MAS 1 group (n = 10) and MAS 1+ group (n = 9). All the groups were subjected to isokinetic passive movement at baseline, 90°/s, 150°/s, 210°/s and 270°/s, respectively. sEMG signals of rectus femoris muscle and lateral head of quadriceps femoris muscle including root mean square (RMS) and integrated electromyography (iEMG) were collected synchronically during isokinetic passive movement.

Results There was no significant difference in RMS and iEMG among baseline and the four angular velocities in the control group and MAS 0 group (P > 0.05). The RMS and iEMG of MAS 1 group at 270°/s were significantly different from baseline and the other angular velocities (P< 0.05), and no significant difference was found among the other velocities (P > 0.05). The RMS and iEMG of MAS 1+ group were significantly different among baseline and the four angular velocities (P< 0.05).

Conclusion RMS and iEMG varies with angular velocity in hemiplegic patients with different muscle tension levels. In patients with the same muscle tension level, the changes of RMS and iEMG with angular velocity are consistent. RMS and iEMG can reflect the degree of spasm. The quantitative evaluation of spasm by sEMG in isokinetic passive movement mode is highly feasible and worthy of further clinical research and promotion.

Key words: stroke, spasticity, isokinetic passive movement, surface electromyography

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