abstract:In music performance and education, thumb position, not a traditional position, is a stringed instrument playing technique used to facilitate playing in the upper register of the double bass, cello, and related instruments, such as the electric upright bass. To play passages in this register, the player shifts his or her hand out from behind the neck and curves the hand, using the side of the thumb to press down the string; in effect, the side of the thumb becomes a movable nut (capo).
It was impossible to find a position that allowed this reviewer to stretch across the screen with his thumb while keeping the lock key within easy reach.
The powered rotation of the thumb can be either controlled directly by the wearer's muscle signals, or can move automatically into position as part of a pre-set grip pattern or gesture.