EEG based cortical investigation for the limit of stability analysis in transfemoral amputees: A comparison with able-bodied individuals

• Autorzy: Khajuria Aayushi , Joshi Deepak

Identyfikatory

DOI

10.1016/j.bbe.2022.01.003

• Języki publikacji: EN

Abstrakty

EN

Background: The evidences for demonstrating the contributions of the cerebral cortex in human postural control is increasing. However, there remain little insights about the cortical correlates of balance control in lower-limb amputees. The present study aimed to investigate the cortical activity and balance performance of transfemoral amputees in comparison to healthy individuals during a continuous balance task (CBT). Methods: The postural stability of the participants was defined with limit of stability parameter. Electroencephalography (EEG) data were recorded in synchronization with the center of pressure (CoP) data from eighteen individuals (including eight unilateral transfemoral amputees). We anticipated that, due to the limb loss, the postural demand of transfemoral amputees increases which significantly modulates the spectral power of intrinsic cortical oscillations. Findings: Using the independent components from the sensorimotor areas and supplementary motor area (SMA), our results present a well-pronounced drop of alpha spectral power at sensorimotor area contralateral to sound limb of amputees in comparison to SMA and the sensorimotor area contralateral to prosthetic limb. Following this, we found significantly higher (p < 0.05) limit of stability (LOS) at their sound limb than at the prosthetic limb. Healthy individuals have similar contribution from both the limbs and the EEG alpha spectral power was similar across the three regions of the cortex during the balance control task as expected. Overall, a decent correlation was found between the LOS and alpha spectral power in both amputee and healthy individuals (Pearson’s correlation coefficient > 0.5). Interpretation: By externally stimulating the highlighted cortical regions, neuroplasticity might be promoted which helps to reduce the training time for the efficient rehabilitation of amputees. Additionally, this new knowledge might benefit in the designing and development of innovative interventions to prevent falls due to lower limb amputation.

Słowa kluczowe

EN

balance control; center of pressure; cortical dynamics; EEG; electroencefalography; neurorehabilitation; transfemoral amputee

PL

kontrola równowagi; centrum nacisku; EEG; elektroencefalografia; neurorehabilitacja

• Wydawca: Nałęcz Institute of Biocybernetics and Biomedical Engineering of the Polish Academy of Sciences ; Elsevier
• Czasopismo: Biocybernetics and Biomedical Engineering
• Rocznik: 2022
• Tom: Vol. 42, no. 1
• Strony: 362--374
• Opis fizyczny: Bibliogr. 57 poz., rys., tab., wykr.

Twórcy

autor

Khajuria Aayushi

• Centre for Biomedical Engineering, Indian Institute of Technology Delhi and Department of Biomedical Engineering, All India Institute of Medical Sciences, New Delhi, India

autor

Joshi Deepak

• Centre for Biomedical Engineering, Block II, Room No: 299, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India

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