Effect of rotating acoustic stimulus on heart rate variability in healthy adults

Bhaskar Roy, Raghabendra Choudhuri, Ambarish Pandey, Sajal Bandopadhyay, Sasmit Sarangi, Sobhendu Kumar Ghatak

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Acoustic stimulus can modulate the Autonomic Nervous System. However, previous reports on this topic are conflicting and inconclusive. In this study we have shown, how rotating acoustic stimulus, a novel auditory binaural stimulus, can change the autonomic balance of the cardiac system. We have used Heart rate Variability (HRV), an indicator of autonomic modulation of heart, both in time and frequency domain to analyze the effect of stimulus on 31 healthy adults. A decrease in the heart rate accompanied with an increase in SD and RMSSD indices on linear analysis was observed post-stimulation. In the Poincaré Plot, Minor Axis (SD1), Major Axis (SD2) and the ratio SD12 (SD1/SD2) increased after the stimulation. Post stimulus greater increment of SD12 with higher lag numbers of (M) beat to beat intervals, when compared to pre stimulus values, resulted in increased curvilinearity in the SD12 vs. Lag number plot. After stimulation, value of exponent alpha of Dretended Flactuation Analysis of HRV was found to be decreased. From these characteristic responses of the heart after the stimulus, it appears that rotating acoustic stimulus may be beneficial for the sympathovagal balance of the heart.

Original languageEnglish (US)
Pages (from-to)71-77
Number of pages7
JournalOpen Neurology Journal
Volume6
Issue number1
DOIs
StatePublished - 2012
Externally publishedYes

Keywords

  • Autonomic Nervous System
  • Detrended Fluctuation Analysis (DFA)
  • Heart Rate Variability
  • Poincaré Plot
  • Rotating Acoustic Stimuli

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology
  • Psychiatry and Mental health

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