Venous Drainage and CSF

Question 1

Term: encapsulated by dura mater, drain CSF and deoxygenated blood from brain and veins of the scalp.

Answer 1

Venous sinuses

Question 2

6 Main Sinuses

Answer 2

1. Superior sagittal
2. Inferior sagittal (forms straight sinus)
3. Sphenoparietal
4. Cavernous
5. Transverse
6. Confluence of sinuses (becomes the sigmod sinus that drains into the jugular veins)

Question 3

Sinus: Drains much of the lateral and superior medial cortex

Answer 3

Superior sagittal sinus

Question 4

Sinus: Drains deep middle cerebral veins

Answer 4

Sphenoparietal sinus

Question 5

Sinus: Drains the occipital cortex and cerebellum

Answer 5

Transverse sinus

Question 6

Term: Integral in supporting the brain, vessels, and CSF

Answer 6

Meninges

Question 7

Term: Tough fibrous membrane that surrounds the venous sinuses

Answer 7

Dura mater

Question 8

Term: Delicate, long strands of connective tissue that form the subarachnoid space

Answer 8

Arachnoid mater

Question 9

Term: Innermost layer tightly attached to the brain surface

Answer 9

Pia mater

Question 10

Term: provides mechanical and chemical support for the brain

Answer 10

Cerebrospinal Fluid (CSF)

Question 11

Structure: Where CSF is made

Answer 11

Choroid plexuses

Question 12

Structure: Winds around the basal ganglia, thalmus, and midbrain

Answer 12

2 Lateral Ventricles

Question 13

Structure: Narrow space between thalami, above hypothalamus

Answer 13

3rd Ventricle

Question 14

Structure: Narrow channel running between the 3rd and 4th ventricle

Answer 14

Cerebral Aqueduct

Question 15

Structure: Pyramind shaped cavity behind the pons and below/anterior/between cerebellum

Answer 15

4th Ventricle

Question 16

Condition: Continued production of CSF when flow is obstructed

Answer 16

Hydrocephalus

Question 17

Describe noncommunicating hydrocephalus

Answer 17

Often due to a blocked cerebral aqueduct

The ventricles dilates, increase intracranial pressure and flattening the gyri agains the skull

In children their head may enlarge

Question 18

Describe communicating hydrocephalus

Answer 18

NOT due to a blockage, rather due to a thickening of the arachnoid space from trauma/infection with reduced absorptoin

If the pressure increase the spinal canal may enlarge

Question 19

Describe normal pressure hydrocephalus

Answer 19

When the CSF pressure doesn’t increase but too much is present

This often occurs in the elderly and can affect gain as well as cause incontinence and dementia