Physics – Medical Physics
Scientific paper
2010-03-10
Physics
Medical Physics
Scientific paper
A novel audio binaural stimulus that generates rotational perceptions of sound movement in brain at a particular predetermined frequency is referred as gyrosonics. The influence of gyrosonics on autonomic nervous system of healthy subjects has been examined by analyzing heart rate variability (HRV) in time- and frequency- domain. The M-lagged Poincare plot shows that the parameters SD1, SD2 and ratio SD12 (SD1/SD2) increases with lagged number M, and M-dependence is well described by Pade' approximant $\chi \frac{1+\beta M}{1+\gamma M}$ where values of $\chi$, $\beta$ and $ \gamma$ depend on parameters SD1,SD2 and SD12. The values of these parameters for different M are augmented after gyrosonic stimulation. The slope and magnitude of curvature of SD1 and SD12 vs M plot increase considerably due to stimulation. The DFA analysis exhibits decrease in value of exponent $\alpha$ due to stimulation. This stimulation results slower Heart rate, higher values of the standard deviation SD and the root-mean squared successive differences (RMSSD) in RR-interval. The spectral power of both low (LF) - and high (HF) - frequency go up due to the stimulation. The results suggest an improvement of the sympatho-vagal balance due to this novel audio stimulus.
Bandopadhaya S.
Choudhuri R.
Ghatak Sobhendu K.
Roy Baishali
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