QuestionSBA
QuestionChoice
The image shows a graphic depiction of the orbit with the periorbital fat in situ and the extraocular muscles present within the fat layer. The abducens nerve is a thin cranial nerve (CN VI) which provides motor innervation to the lateral rectus muscle of the eyeball. It is not visible in the image. However, the blue arrow indicates the optic nerve travelling from the eyeball to the optic canal, in the centre of the orbit. It is surrounded by a thin layer of CSF and the dura mater of the brain.
10041629
d
Abducens nerve
QuestionChoice
The image shows a graphic depiction of the orbit with the periorbital fat in situ and the extraocular muscles present within the fat layer. The trigeminal nerve is the largest cranial nerve and emerges at the level of the lateral pons. Only one of its branches, the ophthalmic division (CN V1), travels to the orbit. It is not visible in the image. However, the blue arrow indicates the optic nerve travelling from the eyeball to the optic canal, in the centre of the orbit. It is surrounded by a thin layer of CSF and the dura mater of the brain.
10041630
e
Trigeminal nerve
QuestionChoice
The image shows a graphic depiction of the orbit with the periorbital fat in situ and the extraocular muscles present within the fat layer. The oculomotor nerve is a thin cranial nerve (CN III) which provides motor innervation to four of the six extraocular muscles (superior rectus, inferior rectus, medial rectus and inferior oblique), as well as to the levator palpebrae superioris muscle. It is not visible in the image. However, the blue arrow indicates the optic nerve travelling from the eyeball to the optic canal, in the centre of the orbit. It is surrounded by a thin layer of CSF and the dura mater of the brain.
10041627
b
Oculomotor nerve
QuestionChoice
The image shows a graphic depiction of the orbit with the periorbital fat in situ and the extraocular muscles present within the fat layer. The trochlear nerve is a thin cranial nerve (CN IV) which provides motor innervation to the superior oblique muscle of the eyeball. It is not visible in the image. However, the blue arrow indicates the optic nerve travelling from the eyeball to the optic canal, in the centre of the orbit. It is surrounded by a thin layer of CSF and the dura mater of the brain.
10041628
c
Trochlear nerve
QuestionChoice
The image shows a graphic depiction of the orbit with the periorbital fat in situ and the extraocular muscles present within the fat layer. The blue arrow indicates the optic nerve travelling from the eyeball to the optic canal, in the centre of the orbit. It is surrounded by a thin layer of CSF and the dura mater of the brain.
10041626
a
Optic nerve
Concept
Chapter
2693
6289
Orbit
Topic
201
Head and neck anatomy
20624
Picture
3223
78 - Orbit (Optic nerve).png
images/4lzfdzxk1727765011575.jpg
images/4lzfdzxk1727765011575_256.jpg
images/4lzfdzxk1727765011575_512.jpg
LCkCDwIKh1eFilhzeXd2mGeWe6II+HkL
Topic
201
Head and neck anatomy
Identify the structure indicated by the blue arrow in the anatomical image below:
[lightgallery]
a