Cranial nerves II

Question 1

Which cranial nerve(s) exit(s) from the dorsal surface of the brainstem?

Answer 1

CNIV Trochlea

Question 2

Which nerve(s) enter the central nervous system at the cerebrum?

Answer 2

CNI olfactory and CNII Optic nerves enter at the cerebrum

Question 3

Which nerve(es) enter CNS at the midbrain level?

Answer 3

CNIII Occulomotor and CNIV Trochlear nerves enter the CNS at the midbrain

Question 4

Which nerve(es) enter CNS at the pons?

Answer 4

CNV Trigeminal, CNVI Abducens, CNVII Facial, CNVIII Vestibulocochlear

Question 5

Which cranial nerve(s) enter the CNS at the medulla?

Answer 5

CNIX Glossopharyngeal, CNX Vagus, CNXI Spinal accessory, CNXII Hypoglossal

Question 6

Which nerves contribute to the ‘gag reflex’ (the pharyngeal reflex/ laryngeal spasm)? What do they each do?

Answer 6

CNIX Glossopharyngeal (somatosensation and motor pharynx) & CNX Vegus (somatosensation and motor for pharynx and larynx)

Question 7

Which nerve(s) carry the gustatory sense?

Answer 7

Facial nerve (CN VII), Glossopharyngeal nerve (CN IX) & Vagus
nerve (CN X)

Question 8

The pulvinar is the main body of the posterior _____

Answer 8

The pulvinar is the main body of the posterior thalamus

Question 9

The medial geniculate nucleus is involved with which process?

Answer 9

The MGN is involved with audition

Question 10

Which cranial nerve do I used for mastication?

What are the other functions of this nerve?

Answer 10

CNV Trigeminal nerve controls mastication.

CNV is also responsible for somatosensation for the face, meninges and tops of head, PLUS somatosensation for the anterior 2/3 tongue!

Question 11

CNV Trigeminal nerve is named for it’s 3 main somatosensation innervations, but it also innervates a fourth area for somatosensation, which sits inside one of the main 3 areas. What is this?

Answer 11

CNV innervates somatosensation for the anterior 2/3 of the tongue as well as the face, meninges and top of the head.