《Chinese Journal of Rehabilitation Theory and Practice》 ›› 2022, Vol. 28 ›› Issue (8): 972-980.doi: 10.3969/j.issn.1006-9771.2022.08.013

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Brain sources characteristics during movement of residual limbs in forearm amputees based on standard low resolution brain electromagnetic tomography technology

GUO Feng1(),HAO Ying2,CHEN Yu1   

  1. 1. Shenyang Sport University, Shenyang, Liaoning 110102, China
    2. Liaoning Special Care Hospital, Shenyang, Liaoning 110021, China
  • Received:2022-03-30 Revised:2022-06-27 Published:2022-08-25 Online:2022-08-30
  • Contact: GUO Feng E-mail:guofeng_first@163.com
  • Supported by:
    Scientific Research Project of Liaoning Education Department(LQN2019ST02)

Abstract:

Objective To observe electroencephalography (EEG) characteristics during movement of residual limbs in forearm amputees using standard low resolution brain electromagnetic tomography (sLORETA) technology.

Methods From June to September, 2019, nine right forearm amputees (amputee group) and 15 normal healthy subjects (control group) were selected. EEG signals were recorded as finishing a straight arm flexion and extension movement task of the left and right upper limbs, and the β rhythm (13 to 30 Hz) of EEG during motor execution was analyzed with sLORETA.

Results The distribution of brain activation was almost the same as the movement of ipsilateral limbs in the control group when the intact limb of amputees moved (|t| < 2.023, P> 0.05). During the stumps moving, activated voxels was the most in BA7, followed by BA6 and BA10 in the frontal lobe, while the number of activated voxels in the BA18 and BA19 of the occipital lobe was significantly higher than those in the normal group (|t| > 2.782, P < 0.05); while the normalized current density of activation was lower than that in the control group, locating in the BA8, BA9, BA10, BA11, BA45, BA46 and BA47 of the frontal cortex, and in the BA7, BA13, BA21 and BA22 of the parietal cortex (|t| > 2.012, P < 0.05), however, it was stronger in the BA17 and BA19 of occipital cortex (|t| > 2.199, P < 0.05).

Conclusion The brain activation of the amputee is similar to the healthy subjects when they moving the intact limb. However, during the movement of the stump, the activated brain regions are moving toward the posterior occipital.

Key words: forearm amputation, movement of residual limbs, electroencephalography, standard low resolution brain electromagnetic tomography

CLC Number: