Ch 5

Question 1

Put the layers of the cranial meningeal system (both normal [physiological] and abnormal [pathological] in order from most superficial to deepest.

Answer 1

1. bone/skin
2. epidural space
3. dura mater periosteal
4. dural venous sinus
5. dura mater meningeal
6. subdural space
7. arachnoid mater
8. subarachnoid mater
9. pia mater
10. brain

Question 2

Put the layers of the spinal meningeal system in order from most superficial to deepest.

Answer 2

1. epidural space
2. dura mater meningeal
3. arachnoid space
4. subarachnoid space
5. pia mater
6. spinal cord

Question 3

What is a subarachnoid cistern?

Answer 3

A larger subarachnoid space

Question 4

What projects into the dural venous sinuses (also known as dural spaces)?

Answer 4

Arachnoid granulations

Question 5

Trace the path of CSF through the ventricular system beginning with the lateral ventricles.

Answer 5

1. lateral ventricle
   2.
2. third ventricle
4. fourth ventricle

Question 6

You just traced the path of CSF through the ventricular system above. It was noted that there are 4 openings through which CSF leaves the fourth ventricle, and 3 such openings were mentioned above. What is the 4th opening (exit) for CSF leaving the fourth ventricle?

Answer 6

-central canal

Question 7

A 75 y.o. M was admitted to the ED with c/o trouble walking and inability to move arms well. An MRI revealed the presence of a brain tumor. Tracer dye injected into the lateral ventricle did not appear in the lumbar CSF, suggesting that the pt. had developed a noncommunicating hydrocephalus. Which is the most likely location of the tumor?

Answer 7

-interventricular foramen

Question 8

A 22 yo M was admitted to the ED after a MCA. A clinical exam showed that he had an elevated ICP due to head trauma. The pt. had severe bradycardia. Acting on which of the following brain regions would elevated ICP most likely cause bradycardia?

Answer 8

-brainstem

Question 9

The membranes that line the cisterns in the cranial cavity are:

Answer 9

-pia mater
-arachnoid mater

Question 10

epidural space in brain

Answer 10

-potential space= bad
-filled w/ blood epidural hematoma
(pathological)

Question 11

dural venous sinus

Answer 11

-actual space
-filled with deoxygenated blood
-receives CSF from arachnoid granulations/villi

Question 12

subdural space

Answer 12

-potential space
-filled with blood subdural hematoma
(pathological)
(bad)

Question 13

subarachnoid mater

Answer 13

-actual space
-norm filled with CSF
-filled w/ blood if something bad happens
aka subarachnoid hemorrhage