Lateral view of the forearm showing the pronator quadratus muscle and its skeletal attachments.

Muscle attachments of acetabular region and proximal femur. C. Proximal femur, posterior view.

Posterior view of the hip and lower back region illustrating the quadratus lumborum muscles and its bony attachments. Muscles are shown on both sides of spine.

Inferior view of the diaphragm and the various openings.

Bones of lower limb showing muscle attachments. B. Posterior view.

Anterior view of the muscles of the right arm (brachialis muscle, brachioradialis muscle, flexor digitorum profundus muscle, pronator quadratus muscle and lumbrical muscles).

Transverse section of the posterior abdominal wall and kidney.

Anterior view of musculature and innervation of posterior abdominal wall and the attachments to the skeleton of that region.

Muscle attachments of acetabular region and proximal femur. A. Acetabular region, lateral view.

Transverse section of back muscles at level of lumbar spine; on left, muscles within sheaths/compartments; on right, empty sheaths.

Fourth layer of muscles on the anterior of forearm.

Instrinsic muscles of the back showing the superficial and intermediate layers.

Quadratus lumborum muscle