Anatomy of the Orbit

These flashcards cover the significant anatomy, functions, and structures related to the orbit, including its bones, connective tissues, and the paranasal sinuses.

Orbit

Bony cavities on either side of the roof of the nose, serving as the socket for the eyeball.

Paranasal Sinuses

Air-filled spaces surrounding the nasal cavity, including frontal, ethmoid, sphenoid, and maxillary.

Periorbita

Dense connective tissue membrane covering the bones of the orbit, providing support for muscles and ligaments.

Trochlea

A structure that acts as a pulley for the tendon of the superior oblique muscle in the orbit.

Lacrimal Fossa

A depression in the medial wall of the orbit that holds the lacrimal gland.

Common Tendinous Ring

A circular tendon from which the four rectus muscles arise, located at the back of the orbit.

Optic Canal

A passage in the lesser wing of the sphenoid bone through which the optic nerve and ophthalmic artery pass.

Suspensory Ligament of Lockwood

A hammock-like sheet that supports the globe from the floor of the orbit.

Inferior Orbital Fissure

An opening located between the maxilla and sphenoid bones that allows passage for nerves and vessels.

Medial Wall of the Orbit

The thinnest wall composed of the maxilla, lacrimal, ethmoid, and sphenoid bones.

Muscles of the Orbit

The muscles that control eye movement, including the superior oblique, inferior oblique, and the four rectus muscles.

Fibrous Septa

Internal membranes within the orbit that compartmentalize the space and support neurovascular structures.