Meninges

1
Meninges Cerebrospinal fluid
2
The meninges

• Dura mater
• Arachnoid
• Pia mater

3
Dura mater
Folds ? falx cerebri ? tentorium cerebelli ?
falx cerebelli ? diaphragma sellae
4
Dura mater
External cerebral veins
Veinous sinuses
Internal jugular vein
Internal cerebral veins
5
Veinous sinuses
Superior cerebral veins superior sagittal sinus
Interemispheric aspect inferior sagittal sinus
6
Veinous sinuses
Pituitary, orbital, middle cerebral veins ?
cavernous sinus
7
Pia mater - Arachnoid
8
The ventricular system
9
CerebroSpinal Fluid
CSF circuit
Luschka
Magendie
10
CSF - functions

• protection (cushion)
• diffusion millieu

Perivascular space (Virchoff Robin)
11
Blood-Brain Barrier
12
Blood-Brain Barrier

• Areas of the brain lacking BBB
• OVLT
• SFO
• Pineal gland
• Median eminence
• Post. pituitary
• Area postrema

13
Meninges of the spinal cord

• Dura mater surrounds the spinal nerve roots
• Subarachnoid space ? lumbar cistern

14
Clinical aspects

• Subdural and extradural hemorrhage
• Herniation
• Meningitis
• Hydrocephalus