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Flashcards in CSF Deck (16)
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1

ventricle connections

interventricular foramen (btwn lateral and 3rd - 2 of them)cerebral aqueduct (btwn 3rd and 4th - 1)

2

CSF exit sites

all 3 in 4th ventricle2 foramen of Lushka (lateral)1 foramen of Magendie (medial)

3

choroid plexus

on at least 1 wall of all ventriclesproduce CSF

4

CSF circulation

1. made through choroid plexus2. CSF from lateral/3rd through cerebral aqueduct3. exit through 4th ventricle foramens4. circulate in subarachnoid space5. drain through arachnoid villi into dural venous sinuses

5

space vs production

90 - 150 cc space400 - 500 cc produced daily

6

CSF qualities

P: 60 - 170 mmH20color: clear or yellowish, pH: 7.33 (little more acidic than art blood)conc: less glucose, much less protein, isotonic w/ serumcells: very few WBCs, no RBCs

7

hydrocephalus mech

increase in CSF vol may lead to dilation of 1+ ventricles

8

communicating hydrocephalus mechanism

impaired CSF absorption @ arachnoid granulations or tumor in subarachnoid space that limits CSF flow--> more vol in ventricles and in subarachnoid space

9

normal pressure hydrocephalus mechanism

type of communicating hydrocephalus common in elderlydue to calcifications of arachnoid granulations

10

normal pressure hudrocephalus

wacky, wet, wobblymental decline, urinary incontinence, abnormal gait (apraxic)

11

apraxic gait

shuffling like feet are stuck to the floor

12

non-communicating hydrocephalus mech

obstruction to CSF flow in ventricular system (blockage)

13

sites of blockage for non-communicating hydrocephalus

interventricular foramen, foramen of Lushka/Magendie*cerebral aqueduct (infants)

14

hydrocephalus ex vacuo

increase in ventricular size and increase in volume of CSF after a loss of brain tissuenormal CSF P

15

arteries into brain

internal carotids (anterior)vertebral arteries (posterior) (through transverse foramina)

16

circle of willis

anterior communicatinganterior cerebralinternal carotidposterior communicatingposterior cerebral