《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2021, Vol. 27 ›› Issue (7): 765-773.doi: 10.3969/j.issn.1006-9771.2021.07.005

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Effect of Brain-computer Interface on Upper-limb Motor Function after Stroke: A Meta-analysis

LI Ling-ling1,YU Ying2,JIA Yu-qi1,HUANG Hai-liang1()   

  1. 1. College of Rehabilitation, Shandong University of Traditional Chinese Medicine, Ji'nan, Shandong 250355, China
    2. College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Ji'nan, Shandong 250355, China
  • Received:2021-01-14 Revised:2021-03-31 Published:2021-07-25 Online:2021-07-28
  • Contact: HUANG Hai-liang E-mail:06000031@sdutcm.edu.cn
  • Supported by:
    Shandong Traditional Chinese Medicine Famous Expert Liu Zhao-chun Inheritance Studio;Shandong Traditional Chinese Medicine Science and Technology Development Planning(2015-030);Shandong University of Traditional Chinese Medicine Research and Innovation Outstanding Team(220316)

Abstract:

Objective To systematically evaluate the effect of brain-computer interface (BCI) on upper-limb motor function after stroke, and compare the effects under different interfaces.

Methods Randomized controlled trials (RCTs) about BCI for upper-limb motor function after stroke were retrieved from databases of PubMed, Embase, Cochrane Library, Web of Science, CNKI, Wanfang Data and CBM, from inception to October, 2020. The quality of the trials was assessed and the data were extracted according to the Cochrane Handbook of Systematic Review. A meta-analysis was carried out with RevMan 5.3 and ADDIS 1.16.8.

Results Ultimately, 14 RCTs involving 504 patients were included. Meta-analysis showed that BCI could obviously improve the Fugl-Meyer Assessment-Upper Extremities (FMA-UE) score (MD = 6.81, 95%CI 1.51 to 12.11,P < 0.05), Action Research Arm Test score (MD = 7.68, 95%CI 0.49 to 14.88, P < 0.05) and modified Barthel Index score (MD = 8.91, 95%CI 5.57 to 12.25, P < 0.001) after stroke. Subgroup analysis showed that FMA-UE score could be improved by BCI for both more than four weeks (MD = 9.44, 95%CI 1.83 to 17.04, P < 0.05) and less than four weeks (MD = 5.18, 95%CI 2.84 to 7.51, P < 0.001). For the types of interface, the probabilities of the best effects from network meta-analysis ranked as electrical stimulator (P = 0.53), visual feedback (P = 0.41) and machine assistance (P = 0.06).

Conclusion BCI, especially with electrical stimulator interface, could obviously improve upper-limb motor function and activities of daily living for stroke patients.

Key words: stroke, brain-computer interface, upper limb, motor, meta-analysis

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