Brainstem

Question 1

Where is the brainstem located?

Answer 1

• Continuous rostrally with diencephalon

- continuous caudally with spinal cord

Question 2

Which two cranial nerves do not attach to the brainstem?

Answer 2

• CN I: attaches to Telencephalon

- CN II: attaches to Diencephalon

Question 3

What are the two regions of the brainstem?

Answer 3

1. Tegmental Area

2. Basilar Area

Question 4

What is in the Tegmental Area?

Answer 4

• Nuclei

- Sensory (ascending) tracts

Question 5

What is in the Basilar Area?

Answer 5

• Nuclei

- Motor (descending) tracts

Question 6

How are tracts in the brainstem usually named?

Answer 6

Usually named for their origin and termination.

Question 7

What are the functions of the brainstem?

Answer 7

1. Acts as the target or source for the cranial nerves that deal primarily with sensory and motor function in the head and neck.
2. Provides a “throughway” for all the ascending sensory tracts, descending motor tracts and local pathways.
3. Involved in integrative (modulatory) functions such as: complex motor patterns, maintenance of homeostasis, and regulating the level of alertness.