Brainstem 1&2

Question 1

The 3 divisions of the brainstem correspond to which 3 developmental divisions?

Answer 1

Midbrain > mesencephalon
Pons > metencephalon
medullu > mylencephalon

Question 2

what are the 3 longitudinal divisions of the brainstem?

Anterior to posterior

Answer 2

Basis, tegmentum, tectum (roof)

Question 3

what is a peduncle?

Answer 3

collection of tracts that travel together from one part of the brain to another

Question 4

The inferior cerebellar
peduncle conveys spinal cord information to the cerebellum and interconnects the cerebellum
with the ____________.

Answer 4

vestibular nucleus and inferior olive

Question 5

The middle cerebellar peduncle is the route by

which information from the cerebral cortex gets to the cerebellum via the ____________.

Answer 5

pontine nuclei

Question 6

The

superior cerebellar peduncle is the route by which the cerebellum gets information back to the ________.

Answer 6

cerebral cortex (via the thalamus).

Question 7

The ventral surface of the midbrain is bounded by the

________ and contains the exit point for the ________.

Answer 7

crus cerebri (cerebral peduncles),
oculomotor nerve (

Question 8

the Brainstem has 3 Main Functions: ______

Answer 8

1. CONDUIT FUNCTIONS:
   Transit and processing stations for ascending and descending pathways between cerebrum, cerebellum, and spinal cord
2. INTEGRATIVE FUNCTIONS:
   “Keeps You Alive!”: Integrative functions, such as consciousness, sleep-wake cycle, muscle tone, posture, respiratory and cardiovascular control (Reticular Formation)
3. CRANIAL NERVE FUNCTIONS:
   Home of the cranial nerves (III-XII) and their nuclei