BrookLyns notes

Question 1

Where is the interpeduncular fossa

Answer 1

Anterior: optic chiasm and tract
Posterior: cerebral peduncles

Inside, is where CN 3 exits.

Question 2

What is the subarachnoid cistern?

Answer 2

Spaces that are formed by openings in the subarachnoid space.
They are anatomic spaces between pia and arachnoid filled with CSF.

Question 3

Where is the quadrigminal cistern?

Answer 3

Between splenium of corpus callosum and the superior surface of the cerebellum.

Contains: pineal gland and CN 4 (trochlear)

Question 4

What is located in the interpeduncular cistern?

Answer 4

1. CN 3 (oculomotor)
2. Optic chiasm
3. Bifurcation of the basilar A
4. P1
5. Posterior communicating A

Question 5

What is the pontine cistern?

Answer 5

Anterior to pons and contains

1. Basilar A
2. Origin of AICA
3. Superior cerebellar A.
4. CN 6 (abducens)

Question 6

Cerebellopontine angle cistern

Answer 6

Lateral angle in between cerebellum and pon

Contains: CN 5 (trigeminal), 7, 8 and AICA

Question 7

Cisterna magna

Answer 7

between the cerebellum and the dorsal medulla

Contains: vertebral A, PICA, CN 9, 10, 11, 12

Question 8

What is in the premedullary cistern?

Answer 8

Ponotomedullar junction -> foramen magum

CN 12 and anterior spinal A.