C Brainstem and cerebellum Flashcards
What are parts of the ventricular system? (2)
- IV ventricle
2, cerebral aqueduct
What is the basic structure of the brainstem? (3)
- midbrain
- pons
- medulla oblongata
What fissure separates the pyramids in the brainstem?
anterior median fissure
Where is the anterior median fissure interrupted and what does this contain?
decussation at pyramids
descending motor fibres
What CN emerges from the anterolateral sulcus of the brainstem?
CN XII
What CNs emerges from the posterolateral sulcus of the brainstem?
CN X and CN IX
Where does the central canal open into the IV ventricle?
obex
What does the IV ventricle divide the medulla into?
- closed/caudal medulla - central canal
2. open/rostral medulla - IVth ventricle
What is the floor of the IV ventricle called?
Rhombid fossa
Which CN emerge from the cerebellopontine angle?
CNVII and CN VIII
What CN emerges at the pontomedullary level?
CN VI
Which CN enters at the mid-pontine level?
trigeminal nerve
Which 2 CNs come of the diencephalon?
CN I and II
What are the main features of the dorsal part of the brainstem?
cerebellar peduncles
Which CN emerges from the pontomesencephalic junction?
CN III
