QuestionSBA
QuestionChoice
The image shows a close view of the inside of the bony orbit on the left side. The inferior orbital fissure is an irregularly shaped foramen found between the sphenoid bone and the maxilla, on the floor of the orbit. It allows the passage of the maxillary nerve, the inferior ophthalmic vein and the sympathetic nerves into the orbit. It is located more lateral (to the right of the image) compared to the structure indicated by the blue arrow which is the optic canal. The optic canal is an opening in the sphenoid bone, which allows the passage of the optic nerve out of, and the ophthalmic artery into the orbit.
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c
Inferior orbital fissure
QuestionChoice
The image shows a close view of the inside of the bony orbit on the left side. The blue arrow indicates the optic canal, which is the opening in the sphenoid bone allowing the passage of the optic nerve out of, and the ophthalmic artery into the orbit. The fact that this is the left orbit can be determined by the presence of the optic canal medial to the superior orbital fissure.
10041691
a
Optic canal
QuestionChoice
The image shows a close view of the inside of the bony orbit on the left side. The foramen ovale is an opening in the base of the greater wing of the sphenoid bone, which allows the passage of the mandibular branch of the trigeminal (CN V) nerve out of the skull at the level of the middle cranial fossa. However, the blue arrow indicates the optic canal, which is an opening in the sphenoid bone, which allows the passage of the optic nerve out of, and the ophthalmic artery into the orbit.
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d
Foramen ovale
QuestionChoice
The image shows a close view of the inside of the bony orbit on the left side. The foramen rotundum is an opening in the base of the greater wing of the sphenoid bone, located inferior to the superior orbital fissure (visible in the image), and which allows the passage of the maxillary branch of the trigeminal (CN V) nerve out of the skull at the level of the middle cranial fossa. However, the blue arrow indicates the optic canal, an opening in the sphenoid bone, which allows the passage of the optic nerve out of, and the ophthalmic artery into the orbit.
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e
Foramen rotundum
QuestionChoice
The image shows a close view of the inside of the bony orbit on the left side. The superior orbital fissure is an irregularly shaped foramen found between the lesser and the greater wings of the sphenoid bone, which allows the passage of the CN III, CN IV and CN VI into the orbit from the skull. It is located more lateral (to the right of the image) compared to the structure indicated by the blue arrow, which is the optic canal. The optic canal is an opening in the sphenoid bone, which allows the passage of the optic nerve out of, and the ophthalmic artery into the orbit.
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b
Superior orbital fissure
Concept
Chapter
2693
6282
Cranial nerve foramina
Topic
201
Head and neck anatomy
20637
Picture
3236
92 - Cranial nerve foramina (Optic canal).png
images/onlbbjkx1727765073046.jpg
images/onlbbjkx1727765073046_256.jpg
images/onlbbjkx1727765073046_512.jpg
3TkGDoDah4h3l4d/hGaHuGeGuq+o+mo=
Topic
201
Head and neck anatomy
Identify the structure indicated by the arrow in the image below:
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a