The document discusses three main topics: 1) The meninges of the brain including the three meningeal layers, the two intracranial spaces, and the four dural septa. 2) Intracranial hemorrhage. 3) The dural venous sinuses including the eight main sinuses and the contents and communications of the cavernous sinus.

1. By Dr Nudrat Nawaid

4. Part 1 Meninges

6. Spaces Between the meninges 1)Sub dural space 2)Sub arachnoid space

7. Subdural and subarachnoid space contd…… cortex

8. Endosteal layer Meningeal layer

9. Innermost layer Innermost layer

13. Meningeal layer sends inward four septa which devide the cranial cavity Dural septa

15. Falx cerebri

16. Falx cerebelli

19. Nerve supply and blood supply of duramater

21. Intra cranial hemorrhage

24. 1)Superior sagittal sinus 2) Inferior sagittal sinus 3) Straight sinus 6) Occipital sinus 7) Superior petrosal sinus 8) Inferior petrosal sinus 9) Cavernous sinus Dural venous sinuses 4) Transverse sinus 5) Sigmoid sinus

25. Dural venous sinuses Cavernous sinus

28. Contents of cavernous sinus * Cranial nerves III IV V 1 V 2 VI Internal carotid artery

30. Communications of cavernous sinus Anteriorly Superior ophthalmic vein Inferior ophthalmic vein Posteriorly Superior petrosal sinus inferior petrosal sinus Inferiorly Pterygoid venous plexus Two cavernous sinuses communicate with each other through Anterior intercavernous sinus Posterior intercavernous sinus

52. Dural venous sinuses