リズミカルな運動の再生に適した刺激回数と刺激間隔の検討

抄録

In this research, we evaluated the ability of an individual to reproduce motion while being conscious of a rhythm after a periodic auditory stimulus was presented, and examined the stimulation interval and number of stimuli suitable for rhythmic exercise. The subjects were 13 healthy volunteers (8 males and 5 females; mean age, 26.2 ± 6.2 years). After an auditory stimulus was presented, the subjects were asked to perform 30 consecutive foot stepping exercises while being conscious of the rhythm. The stimulation intervals of the auditory stimulus were 500, 1000, and 2000 ms. The stimulation frequencies were 2, 3, 5, and 10 times, and 12 kinds of stimulation series were randomly presented. The absolute error and coefficient of variation related to the foot stepping interval with respect to stimulation interval and frequency were compared. The absolute error and coefficient of variation were not significantly different across stimulation intervals and frequencies, and a significant difference was observed only between the stimulation intervals. The absolute error of 500 ms was significantly smaller than those of 1000 and 2000 ms, and that of 1000 ms was significantly smaller than that of 2000 ms (p<0.05). The coefficient of variation of 500 ms was significantly smaller than that of 2000 ms (p<0.05). The results of this study suggest that subjects can recognize rhythm and reproduce rhythmic motion after being exposed to several auditory stimuli.