An overview of the central nervous system.

The central nervous system comprises of the brain and the spinal cord. These structures are protected by the cranium and vertebral column. Contains the majority of nerve cell bodies and synaptic connections. Ensheathed entirely by 3 layers of membranes: – Outermost layer Dura Mater.

  • Tough fibrous coat
  • Spinal dura and cranial dura mostly separate from the periosteum.
  • Can be considered as two layers, fused except at certain spaces.

– Mid layer Arachnoid Mater.

  • Translucent, collagenous membrane.

– Innermost layer Pia Mater.

  • Delicate microscopic thickness.
  • Firmly adherent to CNS surfaces.

Cerebrospinal fluid flows in the sub arachnoid space (arachnoid mater – pia mater). mater

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One thought on “An overview of the central nervous system.

  1. Pingback: The Spinal Cord, anatomy revision. | Epsom tissue techniques

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