Neuroscientists at Israel’s Technion Institute have discovered that neural networks in the brain transition from a “beginner” to an “expert” structure when learning a new skill (e.g. playing sport). The process depends on the local release of dopamine in the motor cortex.

https://www.technion.ac.il/en/blog/article/technion-neuroscientists-uncover-the-key-role-of-dopamine-in-learning-new-motor-skills/

https://www.nature.com/articles/s41467-024-55317-4