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Questions and Answers
What structure is transmitted through the inferior orbital fissure?
Which foramen is located between the frontal and ethmoidal bones and transmits the anterior ethmoidal nerve?
Which canal transmits the optic nerve and the ophthalmic artery?
Through which structure do the trochlear, oculomotor, and abducent nerves pass?
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Which foramen transmits the zygomatic branches?
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Which structure is located posteriorly between the maxilla and the greater wing of the sphenoid?
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Study Notes
The Right Orbit
- Inferior Orbital Fissure is located posteriorly between the maxilla and the greater wing of the sphenoid, communicating with the pterygopalatine fossa, and transmits maxillary nerve, zygomatic branch, inferior ophthalmic vein, and sympathetic nerves.
- Superior Orbital Fissure is located posteriorly between the greater and lesser wings of the sphenoid, communicating with the middle cranial fossa, and transmits lacrimal, frontal, and nasociliary branches of the ophthalmic division of the trigeminal nerve, trochlear, oculomotor, and abducent nerves, as well as the superior ophthalmic vein.
Nerve and Vessel Passages
- Optic Canal, located in the body of the sphenoid, communicates with the middle cranial fossa, and transmits the optic nerve and the ophthalmic artery.
Ethmoidal Foramina
- Anterior Ethmoidal Foramen, located between the frontal and ethmoidal bone, transmits the anterior ethmoidal nerve and vessels.
- Posterior Ethmoidal Foramen, located between the frontal and ethmoidal bone, transmits the posterior ethmoidal nerve and vessels.
Zygomatic Foramen
- Zygomatic Foramen (1 or 2 openings) is located in the zygomatic bone and transmits the zygomatic branches.
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Description
A detailed diagram of the right orbit, highlighting the locations of key bones, foramina, fissures, and nerves. This image helps to identify the inferior orbital fissure, superior orbital fissure, optic canal, and other important features.
