What this means is that you consciously (or subconsciously) attempt to press down with a finger while lifting up with one of more other fingers. Without running an anatomy class (mostly because I don’t know it well enough), essentially your fingers and the muscles/tendons that operate them are interdependent to a degree, which means that they work better together rather than in isolation. As a result, you can make more powerful motions with less strain if you fingers all move in the same direction at the same time. If you move a finger in isolation (one goes up while the others go down) 2 sets of muscles are fighting directly against each other which creates a feeling of tension and begins to restrict speed and accuracy.
This demonstrates that you cannot play down into a note and stretch a finger out at the same time because it causes muscles to pull directly against each other creating tension. Instead we must find a different way to get our fingers around notes that have wide gaps – a description of how to do that is beyond the scope of this post though.
Is that strictly true? It assumes zero finger independence. Surely it's possible to lift one while depressing another? There's no reason why two fingers can't go in opposite directions without straining.
From that position. However, if you start with curved fingers and extend them, the hand can splay open very easily- during the act of movement
You are ofcourse correct, the independence of the fingers varies. 2 can obviously move a lot more comfortably in isolation than 4 can. There is perhaps an acceptable range of motion in opposite directions before tension creeps in. As such, if we look at the range of motion for lifting the 3rd finger for example... If the 2nd finger is down, when you lift the 3rd the height at which tension can be felt will be much lower than if you allow the 2nd to come with it.
In fact, as I understand it, finger extension can be done with the same muscles used to stretch out the fingers..
even more interesting, the fingers can be comfortable stretched out further if its done by an outside force, rather than by you muscles. As in, you can pull you LH fingers apart using your RH much further than you can by using you LH interossei
Yeah, true. It certainly makes sense to make these kind of comparisons, to improve awareness of where slight conflict creeps in. When you can feel even the minute differences, there's much less worry about whether you might be doing it in the wrong way.
As always, great post AJ!!What about stiff wrist in octaves or repeated chords, or about the technique of "staccato"? As you know, I'm struggling with these problem with Prokofiev...I watched the Fink's video (it's really useful and full of stimulating insights), maybe I to study it better....Ciao!Margherita
It tends to produce a very forte tone if you are really letting your weight drop into it, but you can produce beautiful pp/p/mp/mf sounds in the same way by limiting the speed of the decent. That is, that you use your muscles to make your arm fall a bit slower (a very tiny holding up feeling, then let the weight fall in to the key right at the very last instant).