Tag: CNS

Fluid compartment of CNS


Fluid compartment of CNS


Main fluid components – Cerebrospinal Fluid & Cerebral blood flow

Functionality:

• Lubrication by CSF

• Nutrition by cerebral blood flow

Cerebrospinal Fluid:

→ Normal Volume = 150 mL; Normal CSF pressure = 70 -180 mm H2O.

→ Rate of CSF production = 550 mL/day; Recycling rate = 3.7 times/day

→ Site of production = CHOROID PLEXUS; Absorption site = ARACHNOID VILLI

→ Regulation occurs at level of absorption.

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Cells of CNS


The cells present in CNS are:

  • Neurons
  • Glial cells
  • 1.Neurons:
  • Neurons are-
  • Unipolar-Seen in invertebrates
  • Pseudo unipolar-Seen in dorsal root ganglion
  • Bipolar-Seen in Retina & nose
  • Multipolar-Seen in Spinal motor neurons
  • 2.Glial cells:
  • They are-
  • Macroglial cells-Astrocyte, Oligodendrocyte, Schwann cell
  • Microglial cells-Phagocytic cells


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