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Flashcards in Ventricles Deck (22):
1

CSF found in

subarachnoid space
ventricles

2

lateral ventricle

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

3

Atrium

point of communication of the horns

4

glomus

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

5

boundaries of lateral ventricle

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

6

No direct communication btw

2 lateral ventricles

7

Each lateral ventricle communicates with a 3rd ventricle thorugh

bilateral interventricular foramina (of Monro)

8

3rd ventricle

narrow CSF filled space between right and left half of diencephalon

9


3rd ventricle boundaries

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

10

3rd ventricle communicates with the 4th ventricle via

cerebral aqueduct of sylvius

11

cerebral aqueduct

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

12

4th ventricle

dorsal to pons and open medulla
cerebellum forms roof

13

Rhomboid fossa

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

14

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

posterior- foramen of Magendie
laterally - foramina of luschka

15

choroid plexus

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

16

CSF composition

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

17

CSF volume

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

18

arachnoid villi

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

19

CSF function

cushion, buoyant, stable enviornment
50 vs 1500 g

20

communicating hydrocephalis

cerebral ventricles remain in communication with subarachnoid space

21

communicating hydrocephalus

ventricle CSF not able to reach subarachnoid space

22

Stroke

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