| This was the so-called panis quadratus and a piece of this bread was called. |
| The quadratus femoris and obturator externus muscles appear for the first time in this section. |
| The fourth layer is composed of a single muscle, pronator quadratus, which is not seen at this level. |
| The pylorus is overlapped by a part of the liver, usually the lobus quadratus or the umbilical fissure. |
| The internal iliac artery enters the pelvis and supplies the psoas major and quadratus lumborum muscles, the pelvic viscera, and parts of the bony pelvis. |
| This exercise strengthens the obliques, quadratus lumborum, back extensors, gluteals, adductors and core abdominal muscles. |
