Ventricles

Question 1

CSF found in

Answer 1

subarachnoid space

ventricles

Question 2

lateral ventricle

Answer 2

1 in each half of telencephalon
shaped like backward C
anterior horn, body, temporal horn, posterior horn

Question 3

Atrium

Answer 3

point of communication of the horns

Question 4

glomus

Answer 4

large tuft of chord plexus at atrium
can become calcified with age
can be used as radiologic landmark

Question 5

boundaries of lateral ventricle

Answer 5

anterior- genu of corpus callous
rostrum of of corpus callous forms anterior floor
caudate nucleus forms lateral wall
septum pellucidum forms medial wall

Question 6

No direct communication btw

Answer 6

2 lateral ventricles

Question 7

Each lateral ventricle communicates with a 3rd ventricle thorugh

Answer 7

bilateral interventricular foramina (of Monro)

Question 8

3rd ventricle

Answer 8

narrow CSF filled space between right and left half of diencephalon

Question 9

3rd ventricle boundaries

Answer 9

superior- fornix body 
tela choroidea 
laterally thalamus 
and hypothalamus 
anterior border- lamina terminalis

Question 10

3rd ventricle communicates with the 4th ventricle via

Answer 10

cerebral aqueduct of sylvius

Question 11

cerebral aqueduct

Answer 11

courses through mesencephalon (midbrain)
ventral-tegmentum
dorsal- tetum
opens into 4th ventricle

Question 12

4th ventricle

Answer 12

dorsal to pons and open medulla

cerebellum forms roof

Question 13

Rhomboid fossa

Answer 13

2 brain stem regions form rhomboid shaped floor of 4th ventricle

Question 14

3 outflow apertures from 4th ventricle that communicates with Cisterna Magna

Answer 14

posterior- foramen of Magendie

laterally - foramina of luschka

Question 15

choroid plexus

Answer 15

highly vascular
produces CSF
formed from tea choroidea
anterior and posterior choroidal arteries

Question 16

CSF composition

Answer 16

watered down
higher Mg and Cl- concentrations
fills ventricles and subarachnoid spaces and cisterns

Question 17

CSF volume

Answer 17

total in brain 125-150 mL
40 ml in ventricles
500-600 ml is formed in 24 hours

Question 18

arachnoid villi

Answer 18

reabsorbs CSF into venous system
mostly in the superior sagittal sinus
passive diffusion
arachnoid granulations

Question 19

CSF function

Answer 19

cushion, buoyant, stable enviornment

50 vs 1500 g

Question 20

communicating hydrocephalis

Answer 20

cerebral ventricles remain in communication with subarachnoid space

Question 21

communicating hydrocephalus

Answer 21

ventricle CSF not able to reach subarachnoid space

Question 22

Stroke

Answer 22

Ischemic stroke- loss of blood flow
due to occlusion , thrombus, emboli
Hemorrhagic stroke- rupture of end arteries
bleed into brain tissue