Session 4: Group Work

Question 1

I am not a true cranial nerve but an extension of the CNS.

Answer 1

Olfactory nerve

Optic nerve

Question 2

I carry an extension of the meninges and patients can report abnormalities in my function where there is raised ICP.

Answer 2

CN II Optic nerve

Question 3

I arise from the dorsal aspect of the midbrain.

Answer 3

CN IV Trochlear nerve

Question 4

I am vulnerable to compression from raised ICP during my route as I run over the medial part of the petrous bone in close proximity to the edge of the tentorium cerebelli.

Answer 4

CN III Oculomotor nerve

Question 5

I only innervate one of the muscles that move the eye and I arise from the pons.

Answer 5

CN VI Abducens nerve

Question 6

I am one of the branches of the trigeminal nerve but I do not pass through the lateral wall of the cavernous sinus.

Answer 6

Mandibular branch Vc

Question 7

One of my distal (extracranial) motor branches is the buccal nerve.

Answer 7

Facial nerve

Question 8

I pass through the foramen ovale and into the infratemporal fossa.

Answer 8

Mandibular nerve Vc

Question 9

I pass through the foramen rotundum into the pterygopalatine fossa.

Answer 9

Maxillary nerve Vb

Question 10

We each have route through the cavernous sinus.

Answer 10

Oculomotor
Abducens
Maxillary
Ophthalmic
Trochlear

Question 11

In which cranial fossa can you find the frontal lobe?

Answer 11

Anterior

Question 12

In which cranial fossa can you find the temporal lobe?

Answer 12

Middle

Question 13

In which cranial fossa can you find the Occipital lobe?

Answer 13

Posterior

Question 14

In which cranial fossa can you find the brainstem?

Answer 14

Posterior

Question 15

In which cranial fossa can you find the Cerebellum?

Answer 15

Posterior

Question 16

What dense connective tissue structure is found running the length of the longitudinal fissure and to what does this attach anteriorly and posteriorly?

Answer 16

Falx cerebri attaching anteriorly to the crista galli and superiorly it fuses with tentorium cerebelli.

Question 17

What dense connective tissue structure is found running between the inferior part of the occipital lobes and the cerebellum below and to what structures does this attach laterally and posteriorly?

Answer 17

Tentorium cerebelli

Laterally: Superior angle of the petrous ridges of the temporal bone.

Posteriorly: The transverse ridges upon the inner surface of the occipital bone.