A Treatise on Painting/Chapter 47
Chap. XLVII.—Of the Muscle between the Chest and the lower Belly.
There is a muscle which begins under the breast at the Sternum, and is inserted into, or terminates at the Os pubis, under the lower belly. It is called the Rectus of the Abdomen; it is divided, lengthways, into three principal portions, by transverse tendinous intersections or ligaments, viz. the superior part, and a ligament; the second part, with its ligaments; and the third part, with the third ligament; which last unites by tendons to the Os pubis. These divisions and intersections of the same muscle are intended by nature to facilitate the motion when the body is bent or distended. If it were made of one piece, it would produce too much variety when extended, or contracted, and also would be considerably weaker. When this muscle has but little variety in the motion of the body, it is more beautiful[1].
- ↑ Anatomists have divided this muscle into four or five sections; but painters, following the ancient sculptors, shew only the three principal ones; and, in fact, we find that a greater number of them (as may often be observed in nature) gives a disagreeable meagreness to the subject. Beautiful nature does not shew more than three, though there may be more hid under the skin.