Efectivity of Non-invasive Neuromodulation in Parasympathic Nervous System and Vascular System

Direct stimulation of the autonomic nervous system was achieved using Program 7 (P7) of the device, with a directional electrode positioned at the level of the C7 spinous process. P7 delivered a biphasic polarity current with oscillatory frequencies ranging from 1.92 to 14.29 Hz and variable intensities between 0.1 and 0.9 mA.

The placebo group followed the same procedure, except that no current was applied during their 20-minute session.