Ventricles and csf

Ventricles and csf

1. VENTRICLES OF THE
BRAIN AND CSF
(CEREBROSPINAL
FLUID)
PRESENTED BY: Ms. SUKHRAJ KAUR
M.Sc. NURSING (PEDIATRICS)
ASHOKA INSTITUTE OF NURSING, PATIALA

2. 2
VENTRICLES OF THE BRAIN
AND CSF (CEREBROSPINAL
FLUID)
ventricularsystemisasetoffour
interconnectedcavities(ventricles)in
thebrain,wherethecerebrospinalfluid
(CSF)isproduced.Withineachventricleisa
regionofchoroidplexus
1.Rightandleftlateralventricles
2.Thirdventricle
3.Fourthventricle

3. 3

4. 4

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RIGHT AND LEFT LATERAL
VENTRICLES
Theleftandrightlateralventriclesare
locatedwithintheirrespectivehemispheres
ofthecerebrum.Thevolumeofthelateral
ventriclesincreaseswithage.

6. 6
FUNCTIONS OF RIGHT AND
LEFT LATERAL VENTRICLES
Rightandleftlateralventriclesare
structureswithinthebrainthatcontain
cerebrospinalfluid,aclear,wateryfluidthat
providescushioningforthebrainwhilealso
helpingtocirculatenutrientsandremove
waste.

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THIRD VENTRICLE
Thisisthenarrowcavityatthemidline
superiortothehypothalamus.Itis
presentbetweentherightandlefthalves
ofthethalamus,justbelowthelateral
ventricles

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THIRD VENTRICLE FUNCTION
Thethirdventricleisinvolvedinseveral
functionsofthebodyincluding:
ProtectionoftheBrainFromTrauma
PathwayfortheCirculationof
CerebrospinalFluid
TransportationofNutrientsandWaste
fromtheCentralNervousSystem

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FOURTH VENTRICLE
The fourthventriclecontains
cerebrospinalfluid.Ithasadiamond
shapeandislocatedintheupperportion
ofthemedulla.
Ithelpsincommunicationwith
subarachnoidspace

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CSF (CEREBROSPINAL
FLUID)
Cerebrospinalfluid(CSF)istheclear,
colorlessandtransparentfluidthat
circulatesthroughventriclesofbrain,
subarachnoidspaceandcentralcanalof
spinalcord.
ChoroidplexusesproducedtheCSF.
Thechoroidplexusisthebasicallythe
networkcapillariesenterintolateral
ventricles.

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CONTI..
Fromtheeachlateralventriclesfluid
goesthroughanopeningof
IntraventricularForamenintothethird
ventricle.Fromthethirdventricle,then
throughtheCerebralAquaductintothe
fourthventricle.

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FromthefourthventricleCSFgoesto
subarchnoidspacethengoesto
Arachnoidvilli.
FromtheArachnoidvilliCSFmoveto
heartandlungsforpurification.

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14. 14

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VOLUME : 150mL
RATE OF REACTION : 0.3mL per
minute
SPECIFIC GRAVITY : 1.005
REACTION : ALKALINE

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FORMATION OF (CSF)
CSFisformedbychoroidplexuses,
situatedwithintheventricles.
Choroidplexusesarenetworkof
capillariespresentinsidetheventricles.
AlargeamountofCSFisformedinthe
lateralventricles.

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COMPOSITION OF CSF
Cerebrospinal Fluid
Water -99.13%
Solids -0.87%
Inorganic substances
Sodium
Calcium
Potassium
Magnesium
Chlorides
Phosphate, Bicarbonates, Sulfates

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Organic substances
Proteins
Amino acids
Sugar
Cholesterol
Urea
Uric acid
Creatinine
Lactic acid Lymphocytes in CSF

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FUNCTIONS OF CSF
1.PROTECTION
TheCSFprotectsthebrainfrom
damage.Inotherwords,theCSFacts
asacushiontotheheadandlessenthe
impactofinjury.
CSFactsasshockabsorber,protectthe
brainfromasuddenpressureor
temperaturechanges.

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Thecomponentsoftheimmunesystem
presentinthefluid(leukocytes,
immunoglobulin'setc.)providea
protectionagainstvariouspathogensas
well.

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CONTI..
2.EXCRETIONOFWASTEPRODUCTS
Theone-wayflowfromtheCSFtothe
bloodtakespotentiallyharmful
metabolites,drugsandothersubstances
awayfromthebrain.

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CONTI..
3.REGULATION OF CRANIAL
CONTENTVOLUME
Regulationofthisvolumeisessential,
becausebrainmaybeaffectedifvolume
isincreases.
Itispreventedbygreaterabsorptionof
CSFtogivespaceforthecranial
contents.