dural venous sinus, their location, position and contents passing through important sinuses. their tributaries and drainage. paired unpaired sinuses. and there clinical correlation.

1. DURAL VENOUS SINUS
Dr. SANA YASEEN
ANATOMY DEPARTMENT

2. INTRODUCTION
Are venous sinuses of cranial cavity situated between layers of DURA
MATTER .
FEATURES
Lined by endothelium
Lacks smooth muscles
Dont have valves

3. PAIRED, UNPAIRED SINUSES
• There are 23 venous sinuses
• 8 are paired and 7 are un paired
PAIRED VENOUS SINUS UNPAIRED VENOUS SINUS
Cavernous sinus
Superior petrosal sinus
Inferior petrosal sinus
Transverse sinus
Sigmoid sinus
Sphenoparietal sinus
Petrosquamous sinus
Middle meningeal sinus/ veins
Superior sagittal sinus
Inferior sagittal sinus
Straight sinus
Occipital sinus
Anterior intercavernous sinus
Posterior intercavernous sinus
Basilar plexus of vein

5. PAIRED SINUSES
 Cavernous sinus
 Superior petrosal sinus
 Inferior petrosal sinus
 Transverse sinus
 Sigmoid sinus
 Sphenoparietal sinus
 Petrosquamous sinus
 Middle meningeal sinus/
veins

6. CAVERNOUS SINUS
Is paired sinus present on both sided of body of sphenoid bone
RELATION
OUTSIDE SINUS
• SUPERIOR: optic tract, optic chiasma, olfactory tract, internal carotid artery, anterior perforated
suubstance
• INFERIOR: foramen lacerum , body and greater wing of sphenoid bone
• MEDIALLY: hypophysis cerebri, sphenoial air sinus
• LATERALLY: temporal lobe and uncus
• ANTERIORLY: superior orbital fissure and apex of orbit
• POSTERIORLY: apex of petrou temporal and crus of middbrain

9. STRUCTURES PRESENT IN
LATERAL WALL
• From above to down
• Occulomotor nerve
• Trochlear nerve
• Maxillary nerve
• Trigeminal ganglion
STRUCTURE PASSING
THROUGH CENTER
• Internal carotid artery
• Abducent nerve

10. DRAINING CHANNELS
• Right an left cavernous sinus
communicates via anterior and
posterior intercavernous sinus
• Transverse sinus through
inferior petrosal sinus
• Internal jugula vein thorugh
inferior petrosal sinus and
through plexus around internal
carotid artery
• Pteryygoid plexus through
emissary vein
• Facial vein through superior
ophthalmic vein

11. SIGMOID SINUS
• Is direct continuation of transverse sinus
• Is S shaped
• Extend from posteroinferior angle of parietal bone to posterior part of internal
jugular foramen / joins superior bulb of internal jugular vein
• It grooves mastoid part of temporal bone where it separates anteriorly from
mastoid antrum and mastoid air cell only by thin plate.
• TRIBUTARIES:
• Mastoid or condylar emissary vein
• Cerebellar vein
• Internal auitory vein

13. LEFT
MASTOIDECTOMY
EXTERNAL
AUDITORY MEATUS
SIGMOID
SINUS

14. TRANSVERSE SINUS
• Right transverse sinus is the continuation of superior
sagittal sinus
• Left transverse sinus is the continuation of straight
sinus
• Each extends from internal occipital protuberance to
posteroinferior angle of parietal bone at the base of
mastoid here it lies posterior to mastoid antrum and
runs down as sigmoid sinus
• TRIBUTARIES
• Superior petrosal sinus
• Inferior cerebral vein
• Inferior cerebellar vein
• Posterior temporal vein

15. SUPERIOR PETROSAL SINUS
• Superior petrosal sinus lies in the
margin of tentorium cerebelli
• Runs in the upper part of petrous
temboral bone
• And drains covernous sinus into
transverse sinus
• TRIBUTARIES:
• Inferior cerebral vein
• Cerebellar vein
• Tympanic vein

16. • Lies in petro occipital fissure
• drains cavernous sinus into
superior bulb of Internal jugular
vein
• TRIBUTARIES
• Labyrinthine vein
• Veins from meulla , pons and
cerebellum
INFERIOR PETROSAL SINUS

17. UNPAIRED SINUSES
 Superior sagittal sinus
 Inferior sagittal sinus
 Straight sinus
 Occipital sinus
 Anterior intercavernous
sinus
 Posterior intercavernous
sinus
 Basilar plexus of vein

18. SUPERIOR SAGITTAL SINUS
• Occupies upper convex
attached margin of Falx
cerebri
• Begins: crista galli above
foramen ceacum , runs
apward then backward and
end at internal occipital
protuberance and continues
with right transverse sinus

19. TRIBUTARIES:
• Superior cerebral veins
• Parietal emissary veins
• Venous lacunae ( meningeal
vein, diploic vein)
• Veins from nose when foramen
ceacum remain patent

20. INFERIOR SAGITTAL SINUS
• Occupies posterior 2/3 of
lower margin of falx
cereberi .
• Runs back an end by
joining great cerebral vein
to form straight sinus
• It drains medial surface of
cerebral hemisphere

21. STRAIGHT SINUS
• Lies within the junction of falx
cerebri and tentorium
cerebelli
• Formed by union of inferiori
sagittal sinus and great
cerebral vein
• Ends to form R/L transverse
sinus

22. OCCIPITAL SINUS
• Present in the attached
margin of falx cerebelli
• Begans near foramen
magnum and ends in
confluence of sinus

23. DURAL VENOUS
SINUS

25. CLINICALS
Cavernous sinus thrombosis
Pulsating exophthalmos
Thrombosis of superior
sagittal sinus
Thrombosis of sigmoid sinus
Otitis hyrocephalus

26. PULSATING EXOPHTHALMUS

27. CAVERNOUS SINUS THROMBOSIS
UNILATERAL THROMBOSIS DUE TO SPHENOID SINUSOITIS

28. SUPERIOR SAGITTAL SINUS THROMBOSIS

29. OTITIS
HYDROCEPHALUS
ASSOCIATED
WITH LATERAL
SINUS
THROMBOSIS
AND ACUTE
MASTOIDITIS

30. THANK YOU !!!