> "I would guess the main driver for brain stimulation is the coordinative aspect of dealing with many motor skills over different body parts doing different things, while also coordinating the rhythms and cadence of music in your mind. So the more coordinated the movement (ballet, flamenco), the more stimulated."
Interesting that you mention flamenco [1]. I started dancing flamenco 8 years ago, at age 42. I am a late starter to dance, which is a polite way of saying I actively avoided it for most of my life.
When I started, I could barely put together a half-dozen steps. And if I tried to add arm, hand or head movements, my feet went out of time. My brain just didn't feel big enough There was no way I could remember even a tiny section of a choreography like this one I link to from Marco Flores.
Yet as I got more experienced, my brain gradually adjusted to think of body movements as integrated flows, not individual motions. It learnt how to "chunk" them together into logical sequences, and how they align to a piece of music. Much to my surprise, I can now remember complex choreographies several minutes long.
My next challenge is to internalize all of this, so I can relax and dance more comfortably. Maybe I'll never get good enough to improvise dancing with a guitarist and singer. But looking back, I am thrilled how far I've come.
[1] Since few people here will be familiar with flamenco, here is a clip of Spanish dancer Marco Flores performing a Seguiriya: https://youtu.be/ajVmaj6Z93o?t=397.
Notice how Marco beats out what appears a chaotic rhythm with his feet, yet it keeps coming back to the strict beat clapped out by the singer. If you try to follow along, note the rhythm here has a 5-beat bar: 1-and, 2-and, 3-and-a, 4-and-a, 5-and. So the 1, 2 and 5 are short, and 3 and 4 are long.