AIM By using the vestibular illusion simulation training system, the changes in vestibular illusion induction, vestibular autonomic nerve response, and cardiovascular function of subjects at three different speeds were compared, which provided an experimental basis for formulating an appropriate vestibular illusion simulation training scheme.
METHODS Twenty healthy young subjects received vestibular stimulation at speeds of 15, 20 and 25 r/min respectively on the vestibular illusion simulation training system, and each speed stimulation lasted for 5 minutes, and they quickly turned left and right or looked up at a uniform stage. The incidence of hallucination, vestibular symptoms, blood pressure, heart rate and heart rate variability were recorded before and after training.
RESULTS The illusion induction rates of subjects at 15, 20 and 25r/min were 50%, 85% and 90% respectively (P<0.05), and the vestibular symptom scores were 3.9, 4.7 and 5.9 respectively (P<0.05). Compared with before the experiment, the high-frequency power and low-frequency power of the subjects’ heart rate variability were significantly reduced (P<0.05) and increased (P<0.05) at 20 and 25 r/min, and the low-frequency and high-frequency power were significantly increased (P<0.05) at 25 r/min, but there was no significant difference in the heart rate variability indexes among the three speeds.
CONCLUSION The vestibular stimulation with three different intensities can enhance the excitability of sympathetic nerve in different degrees, and the vestibular response and illusion induction rate increase with the increase of rotating speed. When the speed is 20 r/min, the induced rate of vestibular illusion is high and the vestibular reaction is relatively small, so it is suitable to carry out vestibular illusion simulation training.
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