Japanese Journal of Biofeedback Research
Online ISSN : 2432-3888
Print ISSN : 0386-1856
Output of feedforward system involving probabilistic prognosis
M. AkibaY. Miyamoto
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JOURNAL FREE ACCESS

1991 Volume 18 Pages 27-31

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Abstract

The human nervous system is one of the model-reference learning control systems. Every individual forms a neuronal record of his own screen of consciousness. And successive recoding is compared with previous recording, so that every psychological response to stimulation is learned and preserved. It is supposed that this neuronal record is inserted into the command feedforward circuit in the nervous association system. It is already known that repetitive stimuli under a set condition provide the behavior program in the association cortex, and the program is corrected when the input condition is varied. If, suddenly, a given stimulus is removed in process of repetitive set stimuli, the subject will indicate the same or approximate response as the previous responses at the expected time. It is supposed that this response is produced by the error output of the command feedforward system. We should not lose our mental stability by unimportant prognosis. In this study, we tried to examine the appearance of probablistic prognosis response and to access the effectiveness of alpha feedback on prognosis response decreasing. Subjects were eight healthy male volunteers (20 〜22yrs.). Each subject was given the auditory discrete impulse stimuli (95dB, white noize) 30sec. after the warning signal. But, in the first experiment, we kept the number of impulse stimuli secret from the subjects, and next, we notified them of the number. We set the number of impulse, O, l, 2,- - - 6 irregularly. To access the effectiveness of feedback training, the subjects were instructed to be stimulated first at rest, and consecutively during feedback training. The results of these experiments suggested that to experience feedback training and to be well aware of the stimulating schedule are both effective on unimportant pregnosis response decreasing. In the case of feedback training, feedback signals modify the feedforward function, and so a feedback compensated feedforward control system is constructed. The stimulating schedule plays a role in establishing the parameters of the feedforward circuit correctly.

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© 1991 Japanese Society of Biofeedback Research
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