Lateral view of male head and neck bent to the back.

Lateral view of skull showing the muscles used in chewing; medial and lateral pterygoid muscles.

Lateral view of the muscles of the head and neck.

Posterior view of the deep muscles of the torso.

Posterior view of the muscles of the torso.

Lateral view of the skeletal anatomy of the spine.

Posterior view of the muscles of the body (neck and back).

Lateral view of the spinal cord and brain.

Anterior view of male head and neck bent to the left.

Lateral view of male head and neck bent to the front.

Anterior view of skull and neck muscles rotated to its right.

Deep muscles of the back: erector spinae and semispinalis capitis in schematic view.

Lateral view of the skull and neck muscles bent to the back.