Neuro-Ophthalmology: Sixth Nerve

Question 0

fourth ventricle

Answer 0

lies directly posterior to the sixth nerve nucleus

Question 1

7

Answer 1

a lesion of the sixth nerve nucleus is always accompanied by injury to which nerve?

Question 2

Foville syndrome

Answer 2

syndrome caused by damage to the dorsal pons implicating injury to nerves V through VIII as well as central sympathetic fibers

Question 3

Millard-Gruber syndrome

Answer 3

syndrome caused by damage to the sixth nerve fasciculus as it passes through the pyramidal tract

Question 4

Dorello canal

Answer 4

canal under the petroclinoid ligament through which the sixth nerve passes

Question 5

acoustic neuroma, nasopharyngeal tumor, basilar skull fracture, raised intracranial pressure, Gradenigo syndrome

Answer 5

five important causes of damage to the basilar portion of the sixth nerve

Question 6

acute petrositis

Answer 6

cause of sixth nerve palsy in Gradenigo syndrome

Question 7

false

Answer 7

TRUE or FALSE: Like the third nerve, the sixth nerve is susceptible to impingement by aneurysms

Question 8

myasthenia gravis

Answer 8

disease that can mimic virtually any ocular motility defect

Question 9

forced duction test

Answer 9

tool to distinguish a restrictive thyroid myopathy of the medial rectus from a sixth nerve palsy