Study of heart rate variability responses to different intensities of musical auditory stimuli in healthy women

• Grant number: 12/20607-4
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2013
• End date: November 30, 2014
• Field of knowledge: Biological Sciences - Physiology - Physiology of Organs and Systems
• Principal Investigator: Vitor Engrácia Valenti
• Grantee: Joice Anaize Tonon do Amaral
• Host Institution: Faculdade de Filosofia e Ciências (FFC). Universidade Estadual Paulista (UNESP). Campus de Marília. Marília , SP, Brazil

Abstract

The relationship between the auditory system and the cardiovascular system is based on the incidence of hypertension in about 20% of subjects with auditory deficits. Classical music chronically increases the parasympathetic and decreases the sympathetic nervous system, besides reducing heart rate. Heart rate variability (HRV) is a method well recognized in the literature that analyzes cardiac autonomic regulation. However, it is not clear in the literature the effects of different intensities on the regulation of the cardiac autonomic mechanism. Objective: To analyze the effects of different intensities of musical auditory stimulation on HRV in women. Method: The study will be performed in young adults females between 18-30 years old. We will analyze the linear time (SDNN, RMSSD, and pNN50) and frequency (HF: HF, low frequency: LF and, LF / HF) domain of HRV. The evaluation protocol will be based on the record at seated rest for 10 minutes. In this initial period, the subject will remain with the earphone turned off. After 10 minutes of initial registration, the individual will be exposed to classical or heavy metal music in different intensities for five minutes each exposure. The subjects will be exposed to three different intensities: 60-70 dB 70-80 and 80-90 dB.(AU)