Interventions
In our study, it was applied non-invasively by giving ear stimulation using single ear, double ear and earphones specially produced for control application (Kutlu, et al. 2020). Stimulation was done from Vagustim device (Vagustim, Istanbul, TURKEY) at 10 Hz frequency, biphasic, 300 microsecond pulse width and modulation mode. In the adjustment of the flow intensity, it was applied for 20 minutes by keeping the value that the subject felt at the comfort limit constant.