Module 3: Brain & Environs -- Cranium, Ventricles, and Meninges

Question 1

What is the largest foramen in the skull and where is it located?

Answer 1

Foramen Magnum; at the base of the skull in which the spinal cord/brain stem sits.

Question 2

The point at which the spinal cord and the medulla meet is called the ______.

Answer 2

Cervicomeduallry junction

Question 3

fossae

Answer 3

cranial compartments

Question 4

anterior fossa

Answer 4

bilateral; contain the frontal lobes

Question 5

middle fossa

Answer 5

bilateral; contain the temporal lobes

Question 6

posterior fossa

Answer 6

contains the cerebellum and brainstem

Question 7

The anterior fossa is separated from the middle fossa by what structure?

Answer 7

The lesser wing of the sphenoid bone.

Question 8

The middle fossa is separated from the posterior fossa by what structure?

Answer 8

The petrous ridge of the temporal bone and by a sheet of meninges.

Question 9

Meninges

Answer 9

Three protective layers of connective tissue that surround the brain and the CSF.

Question 10

Dura mater

Answer 10

The outer most meninge; composed of two tough fibrous layers that are fused together except for two cases in which they separate.

Question 11

Name the two cases in which the two fibrous layers of the dura mater separate.

Answer 11

Falx cerebri

Tentorium cerebelli

Question 12

Falx cerebri

Answer 12

A flat sheet of dura that is suspended from the roof of the cranium and separates the left and right cerebral hemispheres in the interhemispheric fissure.

Question 13

Tentorium cerebelli

Answer 13

A tentlike sheet of dura that covers the upper surface of the brain.