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Nov 3, 2023 · The apex of the orbit is the optic foramen (canal), bound medially by the body of the sphenoid bone and laterally by the lesser wing of the sphenoid bone. It is medial to the superior orbital fissure. The optic foramen provides passage for the optic nerve (CN II) and ophthalmic artery to exit the skull.
- Maxillary Sinus
The maxillary sinus is the largest paranasal sinus situated...
- Lacrimal Apparatus
Lacrimal artery (lateral-left view) The facial nerve leaves...
- Maxillary Sinus
- Base. Also called the orbital margin or rim, it is the side of the orbit that opens toward the front of the face. It is bordered by the eyelids and has the following 4 margins
- Apex. It is the posteromedial surface pointing towards the skull. This side of the cavity is bound by the sphenoid bone. This is where the optic foramen opens up into the optic canal.
- Roof. It is the superior wall of the orbital cavity, bound by the frontal bone and the sphenoid’s lesser wing. This is the wall that marks the division between the orbital cavity and the anterior cranial fossa.
- Medial Wall. As the name suggests, this is located medially or towards the side of the nose. 4 bones contribute to forming this wall – ethmoid, lacrimal, maxilla, and sphenoid.
Dec 12, 2023 · Infra-orbital: Formed by the zygomatic bone and maxilla’s zygomatic process; Lateral: Formed by the zygomatic bone and its frontal process, along with the frontal bone’s zygomatic process; 2. Apex. It is the posteromedial surface pointing towards the skull. This side of the cavity is bound by the sphenoid bone.
Jun 25, 2024 · Orbital rim fracture – This is a fracture of the bones forming the outer rim of the bony orbit. It usually occurs at the sutures joining the three bones of the orbital rim – the maxilla, zygomatic and frontal. ‘Blowout’ fracture – This refers to partial herniation of the orbital contents through one of its walls.
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Jul 24, 2023 · The following seven bones form the orbit: The orbit is a pear shape, with the optic nerve at the stem, and holds approximately 30 cc volume. The entrance to the globe anteriorly is approximately 35 mm high and 45 mm wide. The depth from orbital rim to the orbital apex measures 40 to 45 mm in adults. The maximum width is 1 cm behind the anterior ...
- Caleb L. Shumway, Mahsaw Motlagh, Matthew Wade
- 2023/07/24
- 2021
In anatomy, the orbit is the cavity or socket/hole of the skull in which the eye and its appendages are situated. "Orbit" can refer to the bony socket, [ 1 ] or it can also be used to imply the contents. [ 2 ] In the adult human, the volume of the orbit is about 28 millilitres (0.99 imp fl oz; 0.95 US fl oz), [ 3 ] of which the eye occupies 6.5 ...
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What are the bones and bony structures of the orbit?
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What is a bony orbit?
Jul 24, 2023 · The orbits are bony structures of the skull that house the globe, extraocular muscles, nerves, blood vessels, lacrimal apparatus, and adipose tissue. Each orbit protects the globe, while the supportive tissues allow the globe to move in three dimensions (horizontal, vertical, and torsional).[1][2] The anatomy of the orbit is a complex topic vital for understanding the communication between the ...
