Facial Vibrotactile Stimulation Activates the Parasympathetic Nervous System: Study of Salivary Secretion, Heart Rate, Pupillary Reflex, and Functional Near-Infrared Spectroscopy Activity
Figure 2
Total salivation from the parotid, submandibular, and sublingual glands after facial skin vibrotactile stimulation on the parotid glands. The increased salivation between RS (resting state) and 89 Hz-face (89 Hz-S on the face) was significant (paired t-test, ), as it was between 89 Hz-face and 89 Hz-neck (89 Hz-S on nap of the neck), or Noise (listening to noise). “Mozart + 89 Hz-face” indicates listening and vibrating to Mozart and 89 Hz-face simultaneously.
