Objective To investigate the real-time intervention effect of transcutaneous auricular vagus nerve stimulation(taVNS)with different stimulation intensities on fear.Methods In this study,80 subjects were selected and randomly divided into 4 groups(20 subjects in each group)to receive different intensities of taVNS.A VR-based fear induction platform was used to induce fear,and the real-time intervention effect was investigated through performance evaluation,physiological changes and subjective scale scores.Results In terms of performance evaluation,the walking distance of 30％stimulation group was significantly higher than that of 10％stimulation group(P＜0.01),the accuracy rate of the nine-light task of 10％stimulation group and 30％stimulation group was significantly higher than that of pseudo-stimulation group(P＜0.05),and the average key reaction time of 30％stimulation group was significantly lower than that of pseudo-stimulation group(P＜0.05).In terms of physiological changes,the respiratory rate of 30％stimulation group was significantly higher than that of 10％stimulation group(P＜0.01).As for subjective scale scores,the posttest score of pseudo-stimulation group was significantly higher than that of 30％stimulation group(P＜0.05).Conclusion taVNS may reduce the intensity of fear.Among the different stimulation intensities of taVNS in this study,30％stimulation intensity is the optimal parameter for real-time intervention of fear.
维普
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