Balance Training With a Vibrotactile Biofeedback System Affects the Dynamical Structure of the Center of Pressure Trajectories in Chronic Stroke Patients

Frontiers in Human Neuroscience

Kentaro Kodama¹  Yuki Hayashi²  Hiroyasu Iwata²  Kazuhiro Yasuda³  Nikita A. Kuznetsov⁴ 

[1] Department of Economics, Kanagawa University, Yokohama, Japan;Graduate School of Creative Science and Engineering, Waseda University, Tokyo, Japan;Research Institute for Science and Engineering, Waseda University, Tokyo, Japan;School of Kinesiology, Louisiana State University, Baton Rouge, LA, United States;

关键词: stroke;    postural control;    haptic biofeedback;    balance rehabilitation;    detrended fluctuation analysis (DFA);   

DOI  :  10.3389/fnhum.2019.00084

来源: DOAJ

【 摘 要 】

Haptic-based vibrotactile biofeedback (BF) is a promising technique to improve rehabilitation of balance in stroke patients. However, the extent to which BF training changes temporal structure of the center of pressure (CoP) trajectories remains unknown. This study aimed to investigate the effect of vibrotactile BF training on the temporal structure of CoP during quiet stance in chronic stroke patients using detrended fluctuation analysis (DFA). Nine chronic stroke patients (age; 81.56 ± 44 months post-stroke) received a balance training regimen using a vibrotactile BF system twice a week over 4 weeks. A Wii Balance board was used to record five 30 s trials of quiet stance pre- and post-training at 50 Hz. DFA revealed presence of two linear scaling regions in CoP indicating presence of fast- and slow-scale fluctuations. Averaged across all trials, fast-scale fluctuations showed persistent dynamics (α = 1.05 ± 0.08 for ML and α = 0.99 ± 0.17 for AP) and slow-scale fluctuations were anti-persistent (α = 0.35 ± 0.05 for ML and α = 0.32 ± 0.05 for AP). The slow-scale dynamics of ML CoP in stroke patients decreased from pre-training to post-BF training (α = 0.40 ± 0.13 vs. 0.31 ± 0.09). These results suggest that the vibrotactile BF training affects postural control strategy used by chronic stroke patients in the ML direction. Results of the DFA are further discussed in the context of balance training using vibrotactile BF and interpreted from the perspective of intermittent control of upright stance.

【 授权许可】

Unknown