Physiology Of Cerebrospinal Fluid

Physiology Of Cerebrospinal Fluid

Crerebrospinal fluid [CSF].
Answer:

• The fluid contained in the central canal of spinal cord, subarachnoid space and cerebral ventricles is known as cerebrospinal fluid.

Crerebrospinal fluid Properties:

• It is clear, color less, transparent, alkaline fluid.
• Specific gravity – 1,005 -1,008
• It is almost protein free and cell free
• Volume-130-150 ml.
• Dialy secretion – 500-550 ml.
• Rate of formation -0.2-0.3 ml/min.
• Pressure-average – 130 mm H2O in lying position, 200 mm in sitting position.
• pH – 7.33 (Alkaline)
• Osmolaity – 289 m Os ml kg/water

Crerebrospinal fluid Composition:

1. Water 99.13%

2. Solids 0.87%

Crerebrospinal fluid Formation:

• 50% by choroid plexuses in the ventricles.
• 40% by blood vessels of meningeal and ependymis lining of ventricles.
• 10% by blood vessels of brain and spinal cord.

Crerebrospinal fluid Circulation:

Crerebrospinal fluid Functions:

• Protective function – CSF acts as buffer and protects brain from shock.
• Acts as a reservoir to regulate the contents of cranium.
• Helps to transfer waste products of brain into blood.
• Serves as a medium for nutrient exchanges.