Effects of variable frequency temporal interference electrical fields stimulation on motor cortex excitabili-ty and motor learning performance
10.3969/j.issn.1001-1242.2024.07.009
- VernacularTitle:变频相位干涉电场刺激对运动皮层兴奋性及运动学习表现的影响
- Author:
Jinlong YAN
1
;
Chunyue ZHU
;
Tianli FU
Author Information
1. 上海体育大学"运动健身科技"省部共建教育部重点实验室,上海,200438
- Keywords:
phase-interferometric electric field stimulation;
primary motor cortex;
motor evoked potentials;
mo-tor learning
- From:
Chinese Journal of Rehabilitation Medicine
2024;39(7):971-977,983
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the effects of temporal interference electrical fields(TI)on motor cortical excitabili-ty and motor learning abilities in healthy adults,in order to provide evidence for the application of TI stimula-tion in human. Method:A randomized crossover double-blind design was used with healthy adults participants.Experiment l:twenty subjects completed transcranial magnetic stimulation(TMS)testing to assess changes in cortical excit-ability indicators before and after stimulation,including motor evoked potentials(MEP),resting motor thresh-old(RMT),short-interval intracortical inhibition(SICI),and intracortical facilitation(ICF).Experiment 2:sixteen subjects completed the random reaction time task(RRTT)and the serial reaction time task(SRTT),with performance indicators including average reaction time(RT),first implicit learning(FIL),and second im-plicit learning(SIL).The effects of TI stimulation on cortical excitability and motor learning abilities were evaluated using a two-factor repeated measures analysis of variance. Result:Experiment 1:there were significant interactions between stimulation condition and time on MEP(F=28.787,P＜0.001,ηP2=0.602)and RMT(F=23.524,P＜0.001,ηP2=0.580),while SICI and ICF showed no significant interaction effects.Experiment 2:compared to sham stimulation,FIL in SRTT was significantly im-proved after TI stimulation(F=4.601,P=0.049,ηP2=0.235),while there was no significant interaction effect in the RRTT task. Conclusion:Variable frequency TI stimulation can significantly increase cortical excitability in the primary mo-tor cortex,and this regulatory effect may contribute to enhancing motor learning performance in healthy adults.
