10 years ago by
A Pianist
After a long search for better ways to play, I think YES, these intrinsic handmuscles are essential
for a complete technique.
Recently, I even began to notice the fleshy'bulbuous' look of the hands of great mature pianists. Just look at the hands of Alan Fraser, Hamelin, Libetta, etc.
And also:
As these muscles get bigger, the metarcarpals get 'spread-out' which in turn facilitates a greater reach!
This may not be the key to everything, but it's very important.