Note 22 — Chapter VII · NATURAL BONE-SETTERS.

Some of my readers will require an explanation of these terms. In a case of fracture the broken ends often slip by each other. We draw therefore upon the two portions to bring them into their proper position. The traction exerted upon the portion the farthest from the body is called extension, while that which is exerted upon the other portion is called counter-extension. So when a bone is dislocated the force exerted in drawing the head of it from its position is called extension, while the force by which its fellow bone is drawn in the opposite direction is called counter-extension.