CSF-function, properties, circulation formation, absorption

1. Cerebrospinal Fluid
• Clear,colorless,transparent fluid
• Circulates through cavity of
-Brain,Subarachnoid space,Central canal of spinal cord
• Belongs to ECF

2. Functions of CSF
• Protection
• Buoyancy
• Excretion of waste products
• Regulation of cranial content volume

3. PROPERTIES
• VOLUME-150 ML
• RATE OF FORMATION-0.3 ml/min
• SPECIFIC GRAVITY:1.005
• REACTION:ALKALINE

4. COMPOSITION

5. • CONTAINS MORE OF SODIUMTHAN K+
• SOME LYMPHOCYTES

6. FORMATION OF CSF
• FORMED BY CHOROID PLEXUS SITUATED WITHINVENTRICLES
• CHOROID PLEXUS:Tuft of capillary projections present inside ventricles and
covered by piamater and ependymal covering
• Large amount of CSF is formed in the lateral ventricles

7. CIRCULATION OF CSF

8. ABSORPTION OF CSF
• By Arachnoid villi into dural sinuses and spinal veins
• Small amount is absorbed along perineural spaces into cervical lymphatics
and into perivascular spaces
• Normally 500 ml formed and absorbed daily

9. Collection of CSF
• LUMBAR PUNCTURE
• CISTERNAL PUNCTURE

10. APPLIED ANATOMY
• MENINGITIS
• HYDROCEPHALUS

13. MENINGITIS

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