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

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VENTRICLES OF THE BRAIN
AND CSF (CEREBROSPINAL
FLUID)
ventricular system is a set of four
interconnected cavities (ventricles) in
the brain, where the cerebrospinal fluid
(CSF) is produced. Within each ventricle is a
region of choroid plexus
1. Right and left lateral ventricles
2. Third ventricle
3. Fourth ventricle

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RIGHT AND LEFT LATERAL
VENTRICLES
The left and right lateral ventricles are
located within their respective hemispheres
of the cerebrum. The volume of the lateral
ventricles increases with age.

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FUNCTIONS OF RIGHT AND
LEFT LATERAL VENTRICLES
Right and left lateral ventricles are
structures within the brain that contain
cerebrospinal fluid, a clear, watery fluid that
provides cushioning for the brain while also
helping to circulate nutrients and remove
waste.

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THIRD VENTRICLE
This is the narrow cavity at the midline
superior to the hypothalamus. It is
present between the right and left halves
of the thalamus, just below the lateral
ventricles

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THIRD VENTRICLE FUNCTION
The third ventricle is involved in several
functions of the body including:
Protection of the Brain From Trauma
Pathway for the Circulation of
Cerebrospinal Fluid
Transportation of Nutrients and Waste
from the Central Nervous System

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FOURTH VENTRICLE
The fourth ventricle contains
cerebrospinal fluid. It has a diamond
shape and is located in the upper portion
of the medulla.
It helps in communication with
subarachnoid space

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CSF (CEREBROSPINAL
FLUID)
 Cerebrospinal fluid ( CSF) is the clear,
colorless and transparent fluid that
circulates through ventricles of brain,
subarachnoid space and central canal of
spinal cord.
 Choroid plexuses produced the CSF.
The choroid plexus is the basically the
network capillaries enter into lateral
ventricles.

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CONTI..
From the each lateral ventricles fluid
goes through an opening of
Intraventricular Foramen into the third
ventricle. From the third ventricle, then
through the Cerebral Aquaduct into the
fourth ventricle.

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From the fourth ventricle CSF goes to
subarchnoid space then goes to
Arachnoid villi.
From the Arachnoid villi CSF move to
heart and lungs for purification.

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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)
CSF is formed by choroid plexuses,
situated with in the ventricles.
Choroid plexuses are network of
capillaries present inside the ventricles.
A large amount of CSF is formed in the
lateral ventricles.

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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
 The CSF protects the brain from
damage. In other words, the CSF acts
as a cushion to the head and lessen the
impact of injury.
 CSF acts as shock absorber, protect the
brain from a sudden pressure or
temperature changes.

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 The components of the immune system
present in the fluid (leukocytes,
immunoglobulin's etc.) provide a
protection against various pathogens as
well.

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CONTI..
2. EXCRETION OF WASTE PRODUCTS
The one-way flow from the CSF to the
blood takes potentially harmful
metabolites, drugs and other substances
away from the brain.

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CONTI..
3. REGULATION OF CRANIAL
CONTENT VOLUME
Regulation of this volume is essential,
because brain may be affected if volume
is increases .
It is prevented by greater absorption of
CSF to give space for the cranial
contents.