. A text-book in general physiology and anatomy. Physiology, Comparative; Anatomy. 268 MUSCLES that moves most is called the insertion of the muscle. (See Fig. 115, A.) That attached to the end which moves. Fig. 115—a, bones of the arm, showing origin and insertion of biceps (a) and triceps (b) muscles; B, a digastric muscle. least, is called the origin of the muscle. By following with the fingers the curve of the biceps muscle, the tendon that attaches it to the radius bone of the forearm and its place of attachment to this bone can be readily felt. The other end is covered with other masses
. A text-book in general physiology and anatomy. Physiology, Comparative; Anatomy. 268 MUSCLES that moves most is called the insertion of the muscle. (See Fig. 115, A.) That attached to the end which moves. Fig. 115—a, bones of the arm, showing origin and insertion of biceps (a) and triceps (b) muscles; B, a digastric muscle. least, is called the origin of the muscle. By following with the fingers the curve of the biceps muscle, the tendon that attaches it to the radius bone of the forearm and its place of attachment to this bone can be readily felt. The other end is covered with other masses of muscle, but dis- section shows it to end in two tendons which are attached to the shoulder blade. In bending the forearm, it is evident that the radius moves most; hence the radius end of the muscle is its insertion in this case, and the shoulder blade its origin. It must be noted, however, that these terms insertion and origin are merely relative terms. For example, in the oper- ation of " chirming" oneself on a horizontal bar the radius bone remains fixed and the shoulder blade is the bone moved. In this case the radius end is spoken of as the origin of the muscle, and the shoulder-blade end as the insertion. Most muscles, however, are so arranged that one end is always the insertion and the other the origin. Many bellied muscles have a single tendon at each Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Eddy, Walter Hollis, b. 1877. New York, Cincinnati [etc. ] American book Co
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