More on Music and Dopamine
https://www.inc.com/scott-mautz/listening-to-music-you-love-has-surprising-brain-benefits-according-to-new-science.html
Can Music Help You Learn?
https://www.mic.com/articles/134356/can-music-help-you-learn-the-brain-can-do-some-incredible-things-while-listening-to-music?mic_referra...
The Effects of Active and Passive Participation in Musical Activity
(Requires University Subscription): https://www.ncbi.nlm.nih.gov/pubmed/12015810
An Introduction to the Endocrine System
https://www.khanacademy.org/science/health-and-medicine/advanced-endocrine-system#endocrine-system-introduction