Rhythmic interactions: Musical tempo, electroencephalographic activity and autonomic responses. Pilot studies

Area of Science:

• Neuroscience
• Psychology
• Music Cognition

Background:

• Music modulates human emotion and physiological states, impacting relaxation and performance.
• Rhythmic auditory stimuli are known to influence brain and autonomic activity.

Purpose of the Study:

• To investigate the effects of rhythmic auditory stimuli on electroencephalographic (EEG) cortical activity.
• To explore the impact of rhythmic auditory stimuli on autonomic activity (heart rate, heart rate variability, respiratory rate).
• To compare responses between musicians and non-musicians.

Main Methods:

• Two pilot studies involving EEG, ECG, and respiratory monitoring during exposure to rhythmic auditory stimuli versus silence.
• Analysis of EEG delta, theta, and alpha bands in temporal areas.
• Calculation of heart rate (HR), heart rate variability (HRV), and respiratory rate (RR) in participants.

Main Results:

• EEG theta band showed consistent, tempo-sensitive modulation; alpha power decreased, indicating sensory blockade but also tempo transition detection.
• Respiratory rate (RR) amplitude and regularity increased with rhythmic stimulation, especially in non-musicians.
• Non-musicians displayed sustained HR increases and higher HRV, while musicians showed an initial HR rise followed by a decrease and lower HRV.

Conclusions:

• Rhythmic auditory input modulates brain activity from autonomic to cortical levels.
• The impact of music on physiological and neural responses differs based on an individual's musical background.
• These findings contribute to understanding how prior neural information processing influences responses to sensory input.