《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2022, Vol. 28 ›› Issue (11): 1241-1246.doi: 10.3969/j.issn.1006-9771.2022.11.001

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Application of three-dimensional dynamic capture system and surface electromyography in upper extremity motor evaluation for stroke patients with hemiplegia

LI Jingyue1,2,ZHANG Tong1,2(),WANG Ya'nan1,2,WANG Chen3   

  1. 1. Capital Medical University School of Rehabilitation, Beijing 100068, China
    2. Beijing Bo'ai Hospital, China Rehabilitation Research Center, Beijing 100068, China
    3. Institute of Automation, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2022-09-08 Revised:2022-10-20 Published:2022-11-25 Online:2022-12-20
  • Contact: ZHANG Tong E-mail:zt61611@sohu.com
  • Supported by:
    National Science Foundation of China(U1613228)


Objective To analyze the kinematic and physiological characteristics of upper limb reaching task for stroke patients and healthy subjects using three-dimensional (3D) dynamic capture system combined with surface electromyography (sEMG) system, to explore the value of evaluation for upper limb motor function in stroke patients.

Methods From January to August, 2019, Qualisys 3D dynamic capture system and sEMG were used to evaluate 40 healthy adults (control group), and 40 stroke patients with hemiplegia with upper limb and hand Brunnstrom stage of Ⅴ, modified Ashworth Scale score ≤ 1 (hemiplegia group) from Beijing Bo'ai Hospital, during target reaching test with hemiplegic or dominant upper limbs. 3D motion angle of shoulder, elbow, wrist and forearm, and root mean square (RMS) of sEMG of related muscles were recorded. The correlation between the results of the hemiplegia group and Fugl-Meyer Assessment-Upper Extremities (FMA-UE) score was analyzed with Pearson coefficient and multiple linear regression.

Results The shoulder pronation and flexion, elbow extension, wrist flexion and ulnar deviation of the hemiplegia group increased compared with thoses of the control group (|t| > 2.321, P< 0.05), while the shoulder adduction and forearm pronation decreased (|t| > 6.426, P< 0.001). There was no significant correlation between the range of motion of upper limb joints and FMA-UE scores in the hemiplegia group (P> 0.05). The RMS of upper trapezius, anterior deltoid, middle deltoid, biceps brachialis, pectoralis major, pronator teres, brachioradialis and extensor digitalis was less in the hemiplegia group than in the control group (|t| > 2.068, P< 0.05), while it was more of triceps (t = -2.652, P< 0.05). The RMS of the upper trapezius negatively correlated with the FMA-UE scores in the hemiplegia group (r = -0.585, P< 0.001), and the RMS of the pronator teres of positively correlation (r = 0.589, P< 0.001). The RMS of the upper trapezius and the pronator teres was the independent factors related with FMA-UE scores (P< 0.01).

Conclusion 3D dynamic capture system combined with sEMG can be an objective and quantitative method to evaluate upper limb motor function in stroke patients.

Key words: stroke, three-dimensional dynamic capture system, surface electromyography, upper limb, motor function

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