Modulating musical reward sensitivity up and down with transcranial magnetic stimulation

Area of Science:

• Neuroscience
• Psychology
• Music Cognition

Background:

• Humans derive pleasure from aesthetic stimuli like music.
• Neuroimaging suggests music pleasure involves fronto-striatal and cortical interactions.
• Previous neuroimaging studies are correlational, lacking causal evidence.

Purpose of the Study:

• To provide causal evidence for the role of fronto-striatal pathways in music-induced pleasure and motivation.
• To investigate the direct impact of modulating fronto-striatal function on aesthetic experiences.

Main Methods:

• Utilized transcranial magnetic stimulation (TMS) to modulate left dorsolateral prefrontal cortex and fronto-striatal function.
• Measured subjective pleasure, psychophysiological arousal, and monetary valuation of music.
• Employed sham stimulation as a control.

Main Results:

• Excitation of fronto-striatal pathways significantly increased perceived pleasure, emotional arousal, and monetary value assigned to music.
• Inhibition of fronto-striatal pathways led to significant decreases in these variables compared to sham stimulation.
• Demonstrated a causal link between fronto-striatal activity and music reward.

Conclusions:

• Fronto-striatal function causally mediates affective and motivational aspects of music-induced reward.
• Provides direct causal evidence supporting models of music pleasure.
• Offers insights into the neural mechanisms underlying aesthetic responses to music.