Effect of high-definition transcranial direct current stimulation on human dynamic balance

doi:10.12307/2022.823

Abstract

Abstract: BACKGROUND: High-definition transcranial direct current stimulation has great potential in promoting the improvement of cognition and motor behavior, which can improve the body’s static balance ability.
OBJECTIVE: To investigate the effect of high-definition transcranial direct current stimulation on the body’s dynamic balance.
METHODS: A total of 36 healthy students from Shenyang Sport University were recruited as test subjects, including 24 males and 12 females. They were divided into three groups by a random number table method, followed by anodic high-definition transcranial direct current stimulation with different current intensities of 0 (sham stimulation), 1, and 2 mA for 20 minutes. The dynamic balance ability was tested before stimulation and immediately and 30 minutes after stimulation. The study protocol was approved by the Institutional Review Board of Shenyang Sport University (approval No. [2020]12).
RESULTS AND CONCLUSION: The subject’s bipedal dynamic stability index and right-foot dynamic stability index were significantly reduced immediately and 30 minutes after 1 mA stimulation (P < 0.05). The offset distance was significantly shortened at 30 minutes after 1 mA stimulation (P < 0.05). The subject’s bipedal dynamic stability index and right-foot dynamic stability index were significantly reduced 30 minutes after 2 mA stimulation (P < 0.05). The offset distance was significantly shortened immediately and 30 minutes after 2 mA stimulation (P < 0.05). Anodic high-definition transcranial direct current stimulation with different current intensities showed no different effects in improving the dynamic balance of the human body (P > 0.05). To conclude, high-definition transcranial direct current stimulation can temporarily improve the dynamic balance ability. It cannot only increase the dynamic stability when standing on single and both feet, but also promote gait stability during active exercises.

Key words: high-definition, transcranial direct current stimulation, dynamic balance, mechanism of action, healthy college students, dynamic stability, offset distance, balance ability

CLC Number:

Qiao Qiqi, Wu Yixin, Wang Xin, Xia Zhongliang. Effect of high-definition transcranial direct current stimulation on human dynamic balance[J]. Chinese Journal of Tissue Engineering Research, 2022, 26(26): 4192-4198.

Figures/Tables 5

假刺激组刺激前后的双足动态稳定指数比较差异无显著性意义(P > 0.05)，刺激前后的单足动态稳定指数比较差异无显著性意义(P > 0.05)。1 mA直流电刺激组刺激后即刻和刺激后30 min的双足动态稳定指数显著低于刺激前(P=0.009，P=0.012)；2 mA直流电刺激组刺激后30 min的双足动态稳定指数显著低于刺激前(P=0.03)。刺激条件与时间(刺激前、刺激后即刻、刺激后30 min)无交互作用(F=0.507，P=0.73)。2 mA直流电刺激组刺激后30 min的左足动态稳定指数显著低于刺激前(P=0.019)。刺激条件与时间(刺激前、刺激后即刻、刺激后30 min)无交互作用(F=1.486，P=0.217)。1 mA直流电刺激组刺激后即刻和刺激后30 min的右足动态稳定指数显著低于刺激前(P=0.031，P=0.016)。刺激条件与时间(刺激前、刺激后即刻、刺激后30 min)无交互作用(F=0.237，P=0.895)。刺激后即刻，3组间双足动态稳定指数比较差异无显著性意义(P >0.05)，3组间单足动态稳定指数比较差异无显著性意义(P >0.05)。刺激后30 min，3组间双足动态稳定指数比较差异无显著性意义(P >0.05)，3组间单足动态稳定指数比较差异无显著性意义(P >0.05)。 2.4.2 偏移距离见表2。 1 mA直流电刺激组刺激后即刻的偏移距离显著短于刺激前(P=0.009)，2 mA直流电刺激组刺激后即刻和刺激后 30 min的偏移距离显著短于刺激前(P=0.009，P=0.001)。3组组内刺激后即刻与刺激后30 min的偏移距离比较差异均无显著性意义(P > 0.05)。刺激后即刻，3组间偏移距离比较差异无显著性意义(P > 0.05)；刺激后30 min，2 mA直流电刺激组偏移距离显著短于假刺激组(P < 0.05)，其余组间两两比较差异均无显著性意义(P > 0.05)。刺激条件与时间(刺激前、刺激后即刻、刺激后30 min)无交互作用(F=1.419，P=0.238)。 2.5 不良反应电刺激过程中受试者头部皮质产生的轻微痒感在电刺激结束后消失。整个试验过程未发生任何不良反应。"

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