Brainstem and Cranial Nerves

Question 1

What is the brainstem comprised of?

Answer 1

Midbrain

Pons

Medulla

Question 2

What passes through the brainstem?

Answer 2

All ascending and descending pathways

Question 3

Where do the pathways synapse?

Answer 3

Many synapse in the brainstem or arise directyl from or synpase in other brainstem nuclei

Question 4

How is the cerebelleum connected to the brainstem?

Answer 4

3 cerebellar peduncels (white fibre tracts)

Question 5

Label the left hand side diagram

Answer 5

Question 6

Which cranial nerves have their nuclei in the brainstem?

Answer 6

9

III-XII apart from XI

Question 7

What does colliculi mean?

Answer 7

Little hills

Question 8

What is the superior colliculus involved with?

Answer 8

Visual pathway

Question 9

What is the inferior colliculus involved with?

Answer 9

Auditory function

Question 10

Which cranial nerved emerge from the medulla?

Answer 10

IX, X and XII

Question 11

What are the two section of medulla?

Answer 11

Open

Closed

Question 12

What are the main features of the medulla?

Answer 12

Rostral continuation of spinal cord

Anterior surface has pyramids (descending tracts)

Posterior surface has dorsal columns

Posterior surface divided into open or closed

Closed has extension of central canal of spinal cord

Canal widens to from 4th ventricle open medulla

Question 13

Where deos CNS blood supply come from?

Answer 13

2 arterial systems:

Anterior and Posterior

Question 14

Which vessels is the anterior supply dereived from?

Answer 14

Internal carotid system

Supplies cerebral hemispheres

Question 15

Which vessels is the posterior supply derieved from?

Answer 15

Vertebral-basilar

Supplies brainstem