Understanding Musical Reward EEG in Depression
Music is often described as a universal language, capable of triggering pleasure, emotion, and even chills. But for people living with major depressive disorder, the brain does not always respond to rewarding experiences in the same way. A new study explored musical reward EEG in depression to understand how brain activity changes when individuals with depression listen to pleasurable music. This research sheds light on anhedonia, a core symptom of depression that involves reduced ability to feel pleasure.
The study investigated how people with major depressive disorder differ from healthy individuals when processing musical reward. Using EEG recordings, researchers examined several types of brainwave signals during music listening, including theta power, frontal alpha asymmetry, beta to alpha ratios, and connectivity patterns in key brain regions.
These findings offer important clues about how the reward system functions in depression and could influence the way neurofeedback and other interventional psychiatric treatments are designed.
What the Study Found About Musical Reward in Depression
Lower reward sensitivity during music
Participants with depression scored significantly lower on the Barcelona Music Reward Questionnaire. This suggests that musical reward sensitivity is reduced, even when listening to music that is normally enjoyable or emotionally engaging. Yet the study also found that individuals with depression can still experience musical reward. Their responses are simply altered.
Abnormal theta activity in the prefrontal cortex
When researchers looked at musical reward EEG in depression, they found that theta power spectral density was higher in both the left and right prefrontal regions for the depression group under low pleasure and musical chill conditions. Increased theta activity may reflect the brain’s attempts to compensate for weakened reward processing.
Theta signals in the frontal cortex are often linked to emotional evaluation and cognitive control. These changes suggest that people with depression may recruit extra resources to process rewarding stimuli like music.
Shifts in connectivity during music listening
Another important measure in the study was theta phase lag index, a way to assess connectivity between brain regions. For individuals with major depressive disorder, this connectivity was significantly higher when listening to music compared to silence. This pattern was seen across neutral, low pleasure, and musical chill conditions.
The authors suggest that this increase in connectivity may reflect a form of compensation in the reward system. Although the reward network is weaker, the brain attempts to strengthen communication between regions to make sense of emotional and pleasurable cues.
Changes in beta to alpha ratio during musical chills
The beta to alpha ratio was especially elevated in the depression group during the musical chill condition. This ratio is sometimes used to estimate mental effort or alertness. A higher beta to alpha ratio might mean that individuals with depression need to exert more cognitive effort to process musical rewards, even when the music evokes chills.
Why These Findings Matter for Interventional Psychiatry
Understanding musical reward EEG in depression may help clinicians design new ways to strengthen reward circuits. For example, EEG based neurofeedback could be tailored to address abnormalities in theta activity or connectivity. Because music naturally engages emotional and cognitive processes, music based neurofeedback protocols could support recovery in patients who struggle with anhedonia.
These insights may also guide multimodal treatment models that combine neurofeedback with TMS, light therapy, or psychedelic assisted therapies that target reward and emotional processing. As interventional psychiatry continues to explore personalized approaches, understanding how the depressed brain responds to natural rewards like music may help develop more effective and engaging treatment options.
Conclusion
The study highlights that while reward sensitivity is weakened in major depressive disorder, individuals can still experience musical reward. Their brain patterns simply show different levels of effort, compensation, and connectivity. By studying musical reward EEG in depression, researchers uncover new pathways that may one day improve personalized treatments and help restore the ability to feel pleasure.
Citations
- Xia L, Su C, Wang J, et al. “Abnormal EEG activity in major depressive disorder during musical reward experience.” Psychiatry Research Neuroimaging. 2025. PMID 41213265. Available at: https://pubmed.ncbi.nlm.nih.gov/41213265/ PubMed
- Sun Y-F, Zhang Q, Wang J, Zhou Z-H. “Neuroimaging and neuroelectrophysiological features of music’s effects on anhedonia in major depressive disorder: A minireview.” World Journal of Psychiatry. 2025;15(7):107721. DOI:10.5498/wjp.v15.i7.107721. Available at: https://www.wjgnet.com/2220-3206/full/v15/i7/107721.htm F6 Publishing+1