The Neural Mechanisms of Music Therapy

Research Objective and Motivation

My research question is how does music therapy affect emotional regulation and the brain regions associated with emotion processing after participating in music therapy. I’m interested in this question because I have seen how music therapy has been used countless times to help people, whether it was to combat PTSD, trauma, anxiety, autism, insomnia, or dementia. In some cases, music therapy had helped people with dementia recall memories that previously seemed inaccessible. These examples make me wonder how exactly music is able to influence our brains and emotions so strongly. By using fMRI to research the brain during emotional regulation, I hope that I can gain a better understanding of the neural mechanism behind music therapy and how these discoveries can improve treatments for mental health and emotional well-being.

Hypothesis and Expected Outcomes

My hypothesis is that participants who complete music therapy will show better emotional regulation than those in the control group. I’m expecting that they will show a higher activity in the prefrontal cortex(specifically the dorsolater prefrontal cortex and anterior cingulate cortex) which are responsible for emotional regulation and cognitive control, and lower activity in the amygdala, which is involved in fear responses and emotional reactivity.(Koelsch, 2014) I’m also predicting that participants in the music therapy group will have higher positive emotions and as a result lower negative ones after the intervention.(Chanda & Levitin, 2013;Leubner & Hinterberger, 2017)

Study Design and Participant Methodology

My participants will be sixty healthy adults, ages 18 to 30. The participants will be randomly split into two groups equally, one group of 30 participants will be in the control group and the other 30 participants will be in the music therapy group. Participants will be screened for neurological disorders, hearing impairments, MRI contraindications, and mental illness. I will also make sure that the participants are diverse and the genders are balanced.

Cognitive and Imaging Techniques

The cognitive method I will use is an emotional regulation task using photos from the International Affective Picture system(IAPS). The participants will see positive, negative, and neutral images when they are in the scanner. During some of the trails they will view the images, while in others they will use cognitive reappraisal strategies to regulate their emotions. I decided to choose this task because it is mostly used to study emotional regulation and can be easily combined with fMRI.

The brain imaging method I will use is fMRI because it allows researchers to efficiently identify which brain regions are active during emotional regulation. Participants will complete emotional regulation tasks while they undergo fMRI scanning before and after the intervention.

The conditions I will compare are first music therapy group vs control group, then pre-interventation vs post-intervention scans, and finally emotional regulation trials vs passive viewing trials. The participants in the music therapy group will take part in an eight week music therapy program that involves emotional reflection, music relaxation exercises, and guided listening. The control group will simply attend wellness education sessions without music.

Data Analysis & Visualization

The dependent variables I will measure are first brain activity in the amygdala, dorsolateral prefrontal cortex, and the anterior cingulate cortex which will be measured with fMRI. Next is self-reported emotional intensity ratings after seeing images. I will measure scores on regulatory and emotional brain regions. And finally, I’ll measure scores on emotional regulation questionnaires such as Difficulties in Emotional Regulation Scale.

My plan for visually representing my data is using bar graphs to compare brain activation levels and emotional regulation between the two groups: music therapy and control. The x-axis on the graph will represent the different conditions, the y-axis represents activation levels or questionnaire scores. I will include fMRI brain maps highlighting increased prefrontal context activity and lowered amygdala activity in the music therapy group after intervention.

References

Chanda, M. L., & Levitin, D. J. (2013). The neurochemistry of music. Trends in Cognitive Sciences, 17(4), 179–193. https://doi.org/10.1016/j.tics.2013.02.007

Motivation: Understand how music affects the body and brain through neurochemical processes such as reward, stress, emotion, and social connection.

Measures:The researchers reviewed old neuroscience studies on how music affects hormones, neurotransmitters, and brain systems involved in reward and emotion.

Main Takeaway: Music can cause neurochemical changes in the brain, an example is dopamine release which explains why music can influence mood and emotion.

Koelsch, S. (2014). Brain correlates of music-evoked emotions. Nature Reviews Neuroscience, 15(3), 170–180. https://doi.org/10.1038/nrn3666

Motivation: figure out how the brian creates emotional responses to music and find the neural system involved in processing these emotions.

Method: The researcher analyzed fMRI and EEG research findings from neuroimaging studies that examined brian activity during emotional responses to music.

Main Takeway: Music triggers brain networks involved in reward, emotion, and emotional regulation.

Leubner, D., & Hinterberger, T. (2017). Reviewing the effectiveness of Music interventions in treating depression. Frontiers in Psychology, 8(1109). https://doi.org/10.3389/fpsyg.2017.01109

Motivation: Understand how music-based interventions include emotional health and well-being.

Method: Researchers studied participants' emotional and psychological responses to music interventions through behavioral measurements and overall analysis of changes in stress and mood.

Main Takeaway: Music intervention improves emotional well-being and decreases stress, this supports the use of music as a tool for mental health.