DOUBLE CONTACT MOVE
Uses
This is indicated for postero-rotary or postero-lateral subluxations. Its line of force is a bisector of the angle between the straight anterior and the straight lateral movement.
Fig. 18. A movement for Atlas when laterally displaced. Contact: metacarpo-phalangeal joint with end of prominent transverse.
Contact
There are two points of contact, both on the first finger, one (first secured) on the radial side of the second phalanx and the other on the radial side of the proximal phalanx. The first contact point is placed against the tip of the spinous, the other behind the transverse process.
Press slightly against the two processes with the finger so as to feel them plainly.
Completing Position
Hold the head with the Hook Support and turn the face away from the adjusting hand (right hand for a P. R., left hand for a P. L.). Drop elbow low and hold it well away from your body so that there appears an obtuse angle between wrist and forearm with the point of the angle toward you. Be careful of this point as the tendency is to make an angle with the point away from you—a weak position.
Drop head backward until firm resistance is felt.
Movement
Force is delivered in an antero-lateral direction as above described, entirely with adjusting hand.