Here’s an interesting article on what’s happening in the brain when we improvise and why this might be valuable:
I would also like to add that 1) improvising is fun in its own right 2) improvisation is a craft that can be appreciated within its own realm of aesthetics
In other words, improvisation need not be a means to an end in order to have merit in a musician’s training.
Similarly, we can all learn music because it develops our brains OR we can learn music because it’s fun, because it’s beautiful and because it can bring others joy (AND, hey, it’s good for our brains, too!)
Of course, I’m sure the author of the article would agree with me, and, certainly, it is great to explore the world of improvisation from a neuroscience perspective – it adds to the picture!