Applied anatomy and kinesiology, the mechanism of muscular movement . a combination of elbow flexion and armdepression, illustrated well by grasping the handles of the chestpulleys with arms at front horizontal and drawing them to the chest; FUNDAMENTAL MOVEMENTS 127 the same is true when handles of overhead pulleys are pulled downto same place. The elbows are completely flexed and the humerusdepressed and carried far backward. Pushing.—Pushing, which is most readily done forward, is a com-bination of extension of the elbow with elevation of the arm, pro-duced by action of the triceps, anterio
Applied anatomy and kinesiology, the mechanism of muscular movement . a combination of elbow flexion and armdepression, illustrated well by grasping the handles of the chestpulleys with arms at front horizontal and drawing them to the chest; FUNDAMENTAL MOVEMENTS 127 the same is true when handles of overhead pulleys are pulled downto same place. The elbows are completely flexed and the humerusdepressed and carried far backward. Pushing.—Pushing, which is most readily done forward, is a com-bination of extension of the elbow with elevation of the arm, pro-duced by action of the triceps, anterior deltoid and upper pectoralismajor, aided by the serratus and pectoralis minor to bring thescapula forward. Striking.—Striking forward, as in boxing (see Fig. 62), involvesthe same movement of the arm as pushing and uses the same muscles,but the manner of doing it is very different. In pushing one placeshis hand on the object to be pushed before the push is made, whilein boxing the fist is given the utmost speed by the arm movementbefore the object is Fig. 74.—The starting position for throwing. A turn of the body can increase the speed of the blow and forthat reason the boxer can do best by striking with one hand at atime. When striking is done with a weapon or tool the blow may bemade forward as in boxing, illustrated by a thrust with a sword,but more often is given by a downward swing of the arm as indriving nails with a hammer, using the arm depressors along withthe triceps. This gains the advantage of the weight of the arm andtool and permits momentum to be gained by the wide swing. Throwing.—Throwing, in its simplest form, as seen in throwingdone by small children and by older people who have not had muchpractice, consists of a forward swing of the straight arm. The handholding the object to be thrown is raised high overhead and thenswung forward by the action of the arm depressors. The hand 128 MOVEMENTS OF ELBOW AND FOREARM describes the arc of a circ
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