手掌への振動提示後に生じる痺れの推移と感覚の変化

We focused on the residual numbness sensation experienced after receiving vibration stimulation for a particular duration. In this study, we investigated the conditions conducive to numbness occurrence and the intensity of numbness and its duration under those conditions. Our findings revealed that numbness occurred and vibration perception diminished following vibration exposure for 40 to 80 seconds, gradually subsiding within 10 to 30 seconds post-stimulation. Additionally, we observed that after 10 seconds from the onset of numbness, stimuli below 10 dB were less perceptible due to residual numbness, whereas vibration perception remained intact for stimuli above 20 dB. Although this experiment primarily assessed the impact of numbness on vibration perception, exploring its effects on tactile sensations beyond vibration perception could broaden the potential applications and interactions, considering the optimal vibration exposure time and duration of residual numbness identified in this study.