• Identify the three layers of meninges and describe their characteristics
  • Name the different real or virtual spaces between the meninges
  • Describe the contents of each space and understand their corresponding disorders


  • Protective membranes surrounding the central nervous system
  • Completely enclosed bag within the spinal canal and the cranial cavity
  • Mesoblastic origin
  • Three layers:
  • Two layers according to the embryology and pathology:
    • Dura mater or pachymeninx
    • Leptomeninge, consisting of two layers : the arachnoid mater and pia mater