Abstract
Background: The physiological responses to auditory stimulation with music are relevant to understand and provide additional information regarding complementary and alternative therapies. Objectives: Investigate the acute effects of auditory stimulation on the globally chaotic parameters of Heart rate Variability (HRV). 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 analyzed 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 influencial with first principal component (PC1) at 0.012; whereas, CFP1 is much more influencial with PC1 of 0.2288. Conclusion: Musical auditory stimulation with a specific classic style did not acutely influence the global chaotic parameters of HRV.
Highlights
BMI — body mass index, Detrended fluctuation analysis (DFA) — detrended fluctuation analysis, DBP — diastolic blood pressure, DPSS — discrete prolate spheroidal sequences, ECG — electrocardiographic, HR — heart rate, Heart rate Variability (HRV) — heart rate variability, MIRE — microphone in real ear, Multi-taper method (MTM) — multi-taper method, PCA — principal component analysis, sDFA — spectral detrended fluctuation analysis, sMTM — spectral multitaper method, SBP — systolic blood pressure, CFP — chaotic forward parameter
A previous study demonstrated that auditory stimulation with a relaxant music style two hours per day, two days per week during eight weeks improved the cardiac autonomic regulation of subjects treated with a cardio-toxic drug [2], its acute effects are still controversial [3, 4]
When we observe the results of PCA; and recalling the ANOVA1 & Kruskal-Wallis statistical analysis we only
Summary
BMI — body mass index, DFA — detrended fluctuation analysis, DBP — diastolic blood pressure, DPSS — discrete prolate spheroidal sequences, ECG — electrocardiographic, HR — heart rate, HRV — heart rate variability, MIRE — microphone in real ear, MTM — multi-taper method, PCA — principal component analysis, sDFA — spectral detrended fluctuation analysis, sMTM — spectral multitaper method, SBP — systolic blood pressure, CFP — chaotic forward parameter. A previous study demonstrated that auditory stimulation with a relaxant music style two hours per day, two days per week during eight weeks improved the cardiac autonomic regulation of subjects treated with a cardio-toxic drug [2], its acute effects are still controversial [3, 4]. In this sense, cardiac inter-beat intervals normally fluctuate in a chaotic wave [5, 6]. The RR-interval of the Electrocardiographic (ECG) trace is necessary for such analysis
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