Alpha Biofeedback Training with Vibratory Sensations

Abstract

We made two experiments to examine the mutual relation between vibratory sensations and the effects of alpha enhancement in feedback training. First we examined the effects of auditory feedback in vibratory disturbing circumstances. Secondary we examined the effects of vibratory feedback compaired with auditory feedback. 8 subjects were devided into 2 groups, A and B. In group A, Alpha auditory feedback training, first in the vibratory chair and subsequently in the normal chair, was employed. And in group B, the procedure was reversed. The results indicate that alpha rhythm can be enhanced by auditory feedback training even in vibratory disturbing circumstances. In addition, the results suggest that alpha enhancement in feedback training in some disturbing cicumstances not always need the previous training in no-disturbing cicumstances. The findings of the second experiments indicate that the effects of vibratoty feedback training is not so different from that of auditory feedback training. In the vibratory feedback training, at first appreciable suppression of alpha activities was observed, but as training session went on, enhancement was achieved satisfactory.