It will be seen that the desire is always to deliver all force in one plane and thus avoid conflict of forces and waste or misdirection through the predominance of one force over the other, and to use both arms with equal facility in the move. There are at least a hundred ways to hinder this movement by varying the preliminary positions. And no one can know the real efficiency of the move who has not become instinctively adept at taking position.
Use of Hands and Arms
Use of hands for palpation has been described. ([P. 46].)
The palpating hand comes to rest with the middle finger on the spinous process of the vertebra to be adjusted. The heel of the hand is raised, the first and third fingers doubled back, and the heel lowered again. Now the middle finger alone is a slender pointer guiding to the contact point.
Place pisiform bone of other hand snugly against the process to be moved. The hand should rest in a slight arch, pisiform against spinous, fingers rigid and flexed on hand, last finger firmly anchored, or pressed into the flesh, to prevent slipping. (Fig. 22 shows the position.)
The anchoring fingers must always extend away from the adjuster. To turn the fingers back across the spine, in moving a vertebra toward you, is always an error, and the price is partial loss of use of one arm.
With the adjusting hand satisfactorily placed, grasp its wrist firmly with the other hand so that the pisiform of the supporting hand rests in the hollow between the wrist and the metacarpal bone of the extended thumb. By this contact force is driven directly through the chain of bones across the wrist and to the pisiform bone without spreading. In grasping the wrist let the thumb extend around the forearm in one direction and the four fingers in the other. Beware of gripping only with thumb and first finger in which case the edge of the supporting hand will rest on the back of the contact hand and spread the delivered force too widely.
Fig. 22. “The Recoil.” Ready for the movement.