O

Palmar view of the labeled thenar muscles of the thumb, including the abductor pollicis brevis, opponens pollicis, and flexor pollicis brevis, along with the recurrent branch of the median nerve.

Opponens Pollicis

Illustration of the superficial and deep layers of the hypothenar muscles in the hand.

Opponens Digiti Minimi

Illustration depicting the deep muscles of the gluteal region, including the quadratus femoris, obturator internus, piriformis, and gemelli muscles.

Obturator Internus

Illustration of the muscles of the medial thigh with anterior compartment muscles removed, highlighting the adductor group.

Obturator Externus

Illustration of the two orbital muscles of facial expression: Orbicularis Oculi and Corrugator Supercilii.

Orbicularis Oculi

Lateral view diagram of the oral muscles of facial expression, highlighting the blending of buccinator and orbicularis oris fibers.

Orbicularis Oris

Illustration of the left occipital muscles located beneath the deep muscles of the back.

Obliquus Capitis Inferior

Illustration of the left occipital muscles located beneath the deep muscles of the back.

Obliquus Capitis Superior

Omohyoid

Illustration of the obturator canal, showing the obturator membrane within the obturator foramen of the pelvis.

Obturator Artery

Diagram illustrating the course of the occipital artery arising from the external carotid artery in the neck.

Occipital Artery

Lateral anatomical illustration of the head and neck showing the occipital vein highlighted in blue along the posterior scalp, with its proximal course labeled.

Occipital Vein

Popular

Illustration of a lateral abdominal wall showing the internal oblique muscle and rectus sheath, with ribs visible superiorly.
Encyclopaedia

Internal Oblique

by Aren Mnatzakanian

Lateral view of the deep structures of the pharynx, highlighting the circular muscles and stylopharyngeus.
Encyclopaedia

Inferior Pharyngeal Constrictor

by Max Bidewell

Illustration of the extrinsic muscles of the tongue, excluding the palatoglossus muscle.
Encyclopaedia

Genioglossus

by Max Bidewell