Lecture 2 (Cranial Nerves)

Question 1

Where is CN VIII found?

Answer 1

Pons AND Medulla

Question 2

What Cranial nerves are found in the midbrain

Answer 2

CN III, IV

Question 3

Where is the red nucleus found?

Answer 3

Midbrain

Question 4

Where is the 4th ventricle found

Answer 4

Pons AND Medulla

Question 5

Where is the Pyramid, Olive and vertebral arteries found?

Answer 5

Medulla

Question 6

What is the Sulcus Limitans?

Answer 6

In the floor of the fourth ventricle, the sulcus limitans separates the cranial nerve motor nuclei (medial) from the sensory nuclei (lateral).

Question 7

Sensory portion is found (dorsal/ventrally)

Answer 7

Dorsal - also known as the Alar plate

Question 8

T or F: The sulcus limitans seperates sensory from motor in the MIDBRAIN

Answer 8

FALSE: There are no sensory nuclei in the midbrain since there is only CN III & IV (Both motor nerves)

Question 9

Which cranial nerves are in the same column for Somatic Motor?

Answer 9

III, IV (Midbrain) VI (Pons) XII (Medulla)

Question 10

Which cranial nerves are in the same column for brachial motor?

Answer 10

V, VII (Pons) IX, X (medulla)

Question 11

Which cranial nerves are in the same column for Visceral Motor

Answer 11

III (Midbrain) VII (Pons) IX, X (Medulla)

Question 12

What are the 2 “subregions” Of the midbrain?

Answer 12

Rostral MB Caudal MB

Question 13

The red nucleus and CN III can be seen in the Rostral/Caudal view of Midbrain?

Answer 13

Rostral only

Question 14

What is the function of the Superior and Inferior Colliculus and where are the found?

Answer 14

Superior - Preliminary visual processing Inferior - Auditory processing Found in the Quadrigeminal plate of the MIDBRAIN

Question 15

What is the function of the Cerebral peduncles (Crus Cerebri) and where is it found?

Answer 15

Relay for cortico-spinal, cortico-pontine and cortic-bulbar tracts Found in midbrain

Question 16

What part of the brain is invloved in reward and when damaged, causes parkinsons disease?

Answer 16

Substantia Nigra - Found in MIDBRAIN

Question 17

What happens if Edinger-Westphal nucleus is damaged?

Answer 17

Pupils enlarge due to fear response

Question 18

T or F: The PONS is located Dorsal to the 4th ventricle

Answer 18

False! Located Ventral to the 4th ventricle

Question 19

Function of CN VI

Answer 19

Abducens nerve (Abduct the eye) Innervates Lateral rectus muscle

Question 20

Where does CN XII exit between in the medulla?

Answer 20

Between the pyramid and olive

Question 21

Function of Olive and Pyramid of medulla?

Answer 21

Pyramid - Decussation of corticospinal tract Olive - Fibers to cerebellum

Question 22

What 2 cranial nerves are involved with the gag reflex?

Answer 22

CN IX - Sensory CN X - Motor

Question 23

Answer 23