Posterior cranial fossa

Question 1

What forms the roof of the posterior cranial fossa?

Answer 1

the tentorium cerebelli

Question 2

What part of the cerebrum occupies the posterior cranial fossa?

Answer 2

none; the tentorium cerebelli separates the cerebrum into a space above the posterior cranial fossa

Question 3

What part of the central nervous system occupies the posterior cranial fossa?

Answer 3

the cerebellum, pons and medulla oblongata

Question 4

What are the contents of the jugular foramen?

Answer 4

the jugular bulb, the inferior petrosal sinus, the tympanic body/tympanic glomus or jugular body/jugular glomus, cranial nerves IX (glossopharyngeal), X (vagus) and XI (spinal accessory)

Question 5

What is the jugular bulb?

Answer 5

the venous expansion between the sigmoid dural venous sinus and the internal jugular vein

Question 6

What is the function of the jugular body/jugular glomus?

Answer 6

a chemoreceptive organ the monitors hypoxia, hypercapnia and increases in the hydrogen ion

Question 7

What will the hypoglossal canal communicate with?

Answer 7

the posterior cranial fossa and the neck