4.11 Brainstem Class Notes 2

Question 1

What is in the inferior medulla?

Answer 1

• central canal
• pyramids
• STT
• DCML synapse (Gracile and cuneate nuclei)
• vestibular nuclei
• spinal accessory nucleus
• oculomotor nuclei
• medial longitudinal fasciculus

Question 2

What is in the upper medulla?

Answer 2

• fourth ventricle
• pyramids
• STT
• CN nuclei 7-12 (dorsal)
• ION

Question 3

Structures in the anterior pons

Answer 3

descending tracts

Question 4

Structures in the posterior pons (aka tegmentum)

Answer 4

ascending tracts

• sensory
• some autonomic
• MLF

cortex » pons » contralateral cerebellum (via ION)

Question 5

What is in the basis pedunculi of the midbrain?

Answer 5

• cerebral peduncles

- SN

Question 6

What is in the midbrain tegmentum?

Answer 6

• red nucleus
• PPN
• cerebral aqueduct

Question 7

What does the red nucleus receive info from?

Answer 7

contralateral cerebellum

Question 8

Where does the red nucleus project?

Answer 8

• cerebellum
• rubrospinal tract
• RF

Question 9

cerebral aqueduct is surrounded by

Answer 9

periaqueductal gray

Question 10

function of periaqueductal gray

Answer 10

• pain suppression
• rxns to pain
• rxns to threats and emotion

**where fight or flight originates

Question 11

pretectal area responsible for

Answer 11

3 eye reflexes

Question 12

What projects to the inferior colliculi?

Answer 12

cochlear division of CN 8

for auditory relay

Question 13

What is the tectum responsible for?

Answer 13

reflexive head movements