Global chaotic parameters of heart rate variability during exposure to musical auditory stimulation

Abstract

The physiological responses to auditory stimulation with music are relevant to understand and provide additional information regarding complementary and alternative therapies. Aim. Investigate the acute effects of auditory stimulation on the globally chaotic parameters of Heart rate Variability (HRV). Material and methods. 27 healthy male students. Measurements of the equivalent sound levels were conducted in a soundproof room. The RR-intervals recorded by the portable HR monitor. HRV was analysed in the following periods: control protocol — the 10-minutes period before the exposure and the 10-minutes period during the exposure to musical auditory stimulation. Results. We have the values of CFP for seven groups for 27 subjects who are undergoing auditory stimulation; hence a grid of 7 by 27 to be assessed. The First Principal Component has a variance of 4,5282 and accounts for 64,7% of the total variance. The Second Principal Component has an eigenvalue of 2,4631 accounting for 99,9% of total variance. When we observe the results of PCA, CFP3 is very weakly influential with first principal component (PC1) at 0,012; whereas, CFP1 is much more influential with PC1 of 0,2288. Conclusion. Musical auditory stimulation with a specific classic style did not acutely influence the global chaotic parameters of HRV.