Cranial Nerves 🥵

Question 1

CN 1, olfactory nerve travels through what foramina?

Answer 1

Cribriform Foramina

Question 2

Describe the route of Cranial nerves III, IV and VI on the way to the orbital cavity?

Answer 2

Passes through the Cavernous Sinus, through the superior orbital fissure into the orbital cavity

Question 3

Describe how a person with an oculomotor nerve lesion would present?

Answer 3

Ptosis, eye position of ‘down and out’, dilated pupil (parasympathetic action)

Question 4

What muscle is innervated by the Trochlear nerve (CN IV) and in turn how would a patient present with a lesion in this nerve?

Answer 4

Superior oblique muscle, they’d have difficulty moving eye downwards when it was inwards (adducted)

Question 5

What is the only cranial nerve arising from the back of the brain stem?

Answer 5

Trochlear Nerve

Question 6

What muscle does Abducens nerve innervate and in turn how would a patient present with a lesion to this nerve?

Answer 6

Lateral rectus muscle, the eye would adducted (inwards) as the muscle is responsible for abducting the eye. This nerve most likely to be effected by raised ICP