This manipulation is performed in such a manner as to cause a double centripetal pressure on a tissue (muscle or tendon), at the same time raising it up from its normal point of attachment.

We have three different kinds of Petrissage:

(a) Kneading with the two thumbs.

Fig. 8. - Kneading on the Hand, for Contracted Tendons and Muscles.

(b) Kneading with the thumb and fingers.

(c) " " " two hands.

Kneading with the two Thumbs (see Figs. 7 and 8) is used to reach individual muscles.

Kneading with the Thumb and Fingers, which manipulation is called Pinching (see Fig. 9), is also used to reach individual muscles, but is preferred on a deep-seated tissue.

Fig. 9. - Kneading with the Thumb and Fingers, Called Pinching.

Fig. 10. - Kneading with Both Hands, Called Squeezing.

Kneading with Both Hands, called Squeezing, is used upon the lower extremities, and upon the arm proper (see Fig. 10) of adults.

The aim of the manipulation Kneading is to reach the separate muscles with a firm double pressure and expose them to an action similar to that of Friction.

Fig. 11. - Clapping of the Leg.

Fig. 12. - Position of Hands in Hacking. 3