CAbdomen and Pelvis DUustration 104

Obturator Internus And Externus

There are two obturator muscles, one internus and one externus internal and external. The obturator externus muscle arises from the pubic and ischial rami. It covers the obturator foramen as a broad flat muscle which converges and travels under the neck of the femur to insert in the fossa of the trochanter on the femur. A fossa is an indentation of bone. Obturator comes from the Latin obdurare, to harden or be inflexible. Ischium is Latin for hip joint and ramus is Latin for branch. The ischial...

Severe Tighting In The Sternohyoid Muscle

Corrugator Supercilii

There are some features unique to the skull. The individual bones do not always dictate the larger shapes of the skull. A suture, or meeting of two different bones, is found in the middle of a larger form. You can see this meeting particularly in the zygomatic arch as well as in the ocular orbit. The frontal bone, the ethmoid and the maxilla have within them empty spaces called sinuses. The ethmoid bone, if cut in half, looks like a cluster of bubbles, and the walls of the sinuses are almost as...