《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2022, Vol. 28 ›› Issue (11): 1360-1364.doi: 10.3969/j.issn.1006-9771.2022.11.017

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Electroencephalogram power spectrum as motor imagery for lower limb amputees

SHAN Xinying1,2,YU Mengsun1,3()   

  1. 1. School of Biological Science and Medical Engineering, Beihang University, Beijng 100191, China
    2. Beijing Key Laboratory of Rehabilitation Technical Aids for Old-Age Disability, National Research Center for Rehabilitation Technical Aids, Beijing 100176, China
    3. Air Force Medical Center PLA, Beijing 100142, China
  • Received:2021-10-25 Revised:2022-04-29 Published:2022-11-25 Online:2022-12-20
  • Contact: YU Mengsun E-mail:biomed_engi@163.com
  • Supported by:
    National Key Research and Development Program(2020YFC2005801)


Objective To explore the mechanism of brain plasticity after lower limb amputation, and the electroencephalogram (EEG) energy changes during motor imagery.

Methods From April to October, 2021, 21 lower limb amputees and 18 healthy subjects were selected to perform motor imagery task, while the 256-EEG were recorded synchronously. The power spectrum of EEG at C3 and C4 electrodes in α (8~13 Hz) and β (13~30 Hz) frequency bands were compared.

Results The power of C4 electrode in β frequency band was stronger in the amputees than in the healthy subjects as imagery of movements of left and right legs, and left foot.

Conclusion EEG power increases in the amputees as motor imagery, which may relate to phantom limb pain and brain plasticity after amputation.

Key words: lower limb amputation, motor imagery, electroencephalogram, power spectrum analysis, brain plasticity

CLC Number: