This document summarizes the dural venous sinuses of the cranial cavity. It describes the key characteristics and classifications of the various sinuses. The unpaired sinuses include the superior and inferior sagittal, straight, occipital, and intercavernous sinuses. The paired sinuses include the transverse, sigmoid, cavernous, petrosal and sphenoparietal sinuses. Each sinus is then described in more detail, including its tributaries, communications, and anatomical relationships.

1. DR. PRATIK MISTRY
INTERIOR OF CRANIAL CAVITY

2. INTRODUCTION

3. Skin
Galea Aponeurotica
Connective Tissue
Bone
Dura Mater
Arachnoid mater

4. Dura Mater
• Tough and leathery.
• Most superficial.
• 2 layers:
– Periosteal  attached to the
skull
– Meningeal  true external
covering, extends downward
and surrounds spinal cord

8. DURAL VENOUS SINUSES

9. CHARACTERISTICS

10. CLASSIFICATION
UNPAIREDUNPAIRED
Superior sagittalSuperior sagittal
Inferior sagittalInferior sagittal
StraightStraight
OccipitalOccipital
Anterior intercavernousAnterior intercavernous
Posterior intercavernousPosterior intercavernous
Basillar venous plexusBasillar venous plexus
PAIREDPAIRED
TransverseTransverse
SigmoidSigmoid
CavernousCavernous
Superior petrosalSuperior petrosal
Inferior petrosalInferior petrosal
SphenoparietalSphenoparietal
PetrosquamousPetrosquamous
Middle meningeal veins

11. SUPERIOR SAGITTAL SINUS

15. TRIBUTARIESTRIBUTARIES
Sup. Cerebral veinsSup. Cerebral veins
Emissary veinsEmissary veins
COMMUNICTINSCOMMUNICTINS
Veins of scalpVeins of scalp
Veins of noseVeins of nose
With cavernous sinusWith cavernous sinus

16. INFERIOR SAGITTAL SINUS

17. STRAIGHT SINUS
TRIBUTARIESTRIBUTARIES
Inf. Sagittal sinus
Cerebeller veins
Great cerebral vein of galen

18. OCCIPITAL SINUS

19. ANT & POST INTERCAVERNOUS
SINUS

20. BASILAR VENOUS PLEXUS

21. PAIRED SINUSES

22. TRANSVERSE SINUS
TRIBUTARIESTRIBUTARIES
Sup petrosal sinus
Inf. cerebral veins
Inf. cerebeller veins
Inf. Anastomotic vein

23. SIGMOID SINUS
TRIBUTARIESTRIBUTARIES
mastoid emissary vein
Cerbeller vein
Labyrinthine vein

24. CAVERNOUS SINUS

25. Paired sinuses on each side
of body of sphenoid
Extend from sup orbital
fissure to the apex of
petrous temporal bone
Internally spongy in
appearance so called
cavernous
2x1 measurements
Formed by separation of
two layers of dura
Roof & lat wall :
meningeal layer
Floor & medial wall :
endosteal layer

26. STRUCTURES PASSING THROUGH SINUS
Internal carotid artery
Abducent nerve
In the lateral wall of it lies
1. oculomotor nerve
2. trochlear nerve
3. ophthalmic nerve
4. maxillary nerve

27. RELATIONS
INFEROMEDIALLY
Pitutairy gland, sphenoid sinus
LATERALLY
Trigeminal ganglion, temporal
lobe of brain
ABOVE
Optic chiasma, part of ICA

28. TRIBUTARIES AND COMMUNICATIONS
Sup ophthalmic vein
Br of inf ophthalmic
vein
Central vein of retina
Superficial middle
cerebral vein
Inf cerebral vein
Sphenoparietal sinus

29. SUPERIOR PETROSAL SINUS

30. INFERIOR PETROSAL SINUS

31. SPHENOPARIETAL SINUS

32. MIDDLE MENINGEAL VEINS

38. THANK YOU