Joe's Blog

{13} The Full Ambit Of A Motion

May 9, 2017

{13} The Full Ambit Of A Motion

For a part of the body to be able to move freely in one particular direction, it is important that it be ready to move, in an unrestrained way, in all other directions as well.   There is greater efficiency in the chosen direction of motion when there are no restrictions along the periphery of that motion.

A finger can flex at the knuckles.   It should, however, also be able to un-flex (perhaps brushing along the surface of the keys towards the fall board), or move sideways from a pivot point at the third knuckle, or rotate in the socket of the third knuckle.

The first thing is to explore how far in all directions the finger can move.

Circles by the fingers, for instance, are possible by combining in varying proportions left-right motion with up-and-down motion.  The result is not a perfect circle, because the finger may not be able to move as far out along a radius in one direction as an other.  For example, as the second finger moves laterally in the direction of the pinky, it is blocked prematurely by the third finger, but by sliding over the third finger, it can continue to move further towards the fourth finger, to continue making a circle.  At each point along the circle the finger tip should be at it fullest possible extension from the central point of the circle.


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