Research Article

Facial Vibrotactile Stimulation Activates the Parasympathetic Nervous System: Study of Salivary Secretion, Heart Rate, Pupillary Reflex, and Functional Near-Infrared Spectroscopy Activity

Figure 6

Integral values of oxy-Hb concentration produced with vibrotactile stimuli for 2 min are shown. Integral values were derived from oxy-Hb concentrations of channels 4, 7, 10, and 13 in the central part of the frontal cortex, as shown in Figure 4(a). (a) Integral values produced in the resting state (RS), listening to classical music (Mozart, Eine Kleine Nachitmusik), 89 Hz-S on the face (89 Hz-face), and listening to noise (Noise). There was a significant difference between RS and 89 Hz-face (paired t-test, ). (b) Furthermore, we divided the Mozart listening group into fans of Mozart and no-fans of Mozart. Note that there were wide differences between the fans and nonfans of Mozart groups. Thus, nonfans group may listen as the noise, even if listening to Mozart.
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(a)
910812.fig.006b
(b)