Neuro 4 - Brainstem and CNs

Question 1

What does the brain stem consist of?

Answer 1

midbrain, pons, medulla

Question 2

2 parts of the midbrain?

Answer 2

dorsal - tectum

ventral - tegmentum

Question 3

What does the dorsal midbrain contain?

Answer 3

tectum - made up of superior and inferior colliculi

Question 4

What are the superior and inferior colliculi responsible for?

Answer 4

S; visual reflexes

I; auditory reflexes (looking towards a loud noise )

Question 5

What does the ventral tegmentum contain?

Answer 5

• red nucleus
• substantia nigra
• reticular formation

Question 6

Where are the crus cerebri and mammillary bodies found?

Answer 6

ventral midbrain

Question 7

What do the cerebellar peduncles do? How many are there?

Answer 7

there are 3 - they connect the cerebellum to the brainstem

Question 8

What are the superior and inferior brachii?

Answer 8

fibres that extend from their respective colliculi to the geniculate bodies in the thalamus

• S: lateral geniculate bodies
• I: medial geniculate bodies

Question 9

What separates the pons from the medulla?

Answer 9

bulbopontine sulcus

Question 10

What runs down the middle of the pons?

Answer 10

basilar sulcus - basilar artery runs here

Question 11

What are the pyramids?

Answer 11

white matter structures containing motor fibres of the pyramidal tracts

Question 12

The floor of the 4th ventricle is formed by the…

Answer 12

dorsal/posterior pons

Question 13

The roof of the 4th ventricle is formed by the…

Answer 13

cerebellum

Question 14

What is the medulla a continuation of?

Answer 14

spinal cord

Question 15

What do the olives contain?

Answer 15

inferior olivary nucleus - motor learning

superior olivary nucleus - perception of sound

Question 16

The posterior median sulcus marks the..

Answer 16

midline of the medulla

Question 17

What lies either side of the posterior median sulcus?

Answer 17

gracile tubercle

Question 18

Where is the cuneate tubercle?

Answer 18

in the medulla, lateral to the gracile tubercle

Question 19

Mnemonic for the nerve types of the cranial nerves?

Answer 19

Some Say Marry Money But My Brother Says Big Brains Matter Most

Question 20

What will a cavernous sinus lesion affect?

Answer 20

Occulomotor, trochlear, abducens nerve

Question 21

What does the cavernous sinus contain?

Answer 21

internal carotids and 5 CN nuclei

CN III, IV, V1, V2, V6

Question 22

Occulomotor lesion will lead to…

Answer 22

the eyes to look down and out