Peter Attia· MD
it's actually this intrinsic muscle here that's tapering down and has a very thin tendon it turns into a lateral band and it travels from the Palm side up above the middle knuckle above that axis of rotation and then it goes all the way and attaches to the tip and so it's a super cool mechanism that through a series of mechanical placements it's able to extend the finger even though by Contracting Yeah by Contracting it's straightening up the finger