Dural Venous Sinuses Flashcards
Dural Venous Sinuses present in Meningeal Layer of Dura
Inferior Sagittal Sinus
Straight Sinus
Tentorium Cerebelli is
Partition b/w Cerebrum and Cerebellum
Sinuses present in Tentorium Cerebelli
Straight Sinus
Transverse Sinus
Superior Petrosal Sinus
Dural Fold Present b/w 2 Cerebrum
Falx Cerebri
Sinuses present in Falx Cerebri
Superior and Inferior Sagittal Sinuses
Straight Sinus
Dural Fold present b/w 2 Cerebellum
Falx Cerebelli
Occipital Sinus present in the
Falx Cerebelli
What is Diaphragma Sellae
Dural fold present over Pituitary Gland
And forms Roof of Sella Turcica
Unpaired Dural Venous Sinuses
Superior sagittal sinus
Inferior sagittal sinus
Straight sinus
Basillar venous plexus
Post. and Ant. Intercavernous sinus
Occipital sinus
Superficial Sagittal Sinus Drain into
Right Transverse Sinus
Inferior Sagittal Sinus will continue as
Straight Sinus
Straight Sinus + Galen Vein → Left Transverse Sinus
Each Transverse Sinus will Continue as
Sigmoid Sinus → Internal Jugular Vein
How Lateral Sinus is made
Transverse Sinus + Sigmoid Sius
Confluence of Sinus is
Meeting point of 4 sinuses
Transverse Sinus
Occipital Sinus
Superior Sagittal Sinus
Straight Sinus
Location of Cavernous Sinus
On either side of Body of Sphenoid
Medially to Cavernous Sinus
Sphenoid Sinus
Pituitary Gland
What is Trans Sphenoidal Hypophysectomy?
Removal of Pituitary Gland via Sphenoidal Sinus Approach
Only skilled Surgeons can do this surgery
Structures passing through Cavernous Sinus
ICA
VI CN ~ inferolaterally to ICA
Structures passing through Lateral wall of cavernous sinus
Occulomotor Nerve
Trochlear Nerve
Ophthalmic Nerve
Tributaries tht draining into Cavernous Sinus
M ~ middle meningeal vein
I ~ inferior cerebral vein
SS ~ sphenoparietal sinus
R ~ central vein of Retina
O ~ Ophthalmic vein
S ~ Superior ophthalmic vein
I ~ Inferior ophthalmic vein
SMC ~ Superficial Middle Cerebral Vein
1st Tributary of Internal Jugular Vein
Inferior Petrosal Sinus
Structures passing through Jugular Foramen
Inferior Petrosal Sinus
CN - IX, X, XI
Cavernous Sinus Draining into Transverse Sinus via which outflow channel
Superior Petrosal Sinus
Cavernous Sinus Draining Into Inferior Jugular Vein via which outflow channel
Inferior Petrosal Sinus
Facial Vein Communicating to the cavernous sinus most commonly through
Superior ophthalmic vein
Septic emboli from Facial vein reach Cavernous most commonly through
Superior ophthalmic vein
Another route is via Deep Facial Vein
Only vein to acts as Tributary and communicating channel to cavernous sinus is
Superior ophthalmic vein
What is Vein of Labbe
It is the Inferior Anastomosing Vein
Which connects Superficial Middle Cerebral Vein to Transverse Sinus
Vein Which connects Superficial Middle Cerebral Vein to Superior Sagittal Sinus
Vein of Trolard ~ Superior Anastomosing Vein
Arterial Supply to Posterior Cranial Fossa
Vertebral Artery (from 1st part of subclavian artery)
Occipital Artery
Meningeal Branch of Ascending Pharyngeal Artery (supply middle and post. cranial fossa)
Arterial Supply to Middle Cranial Fossa
Accessory Middle Meningeal Artery
Middle Meningeal Artery
Meningeal Branch of Cavernous part of ICA
Meningeal Branch of Ascending Pharyngeal Artery
Arterial Supply to Anterior Cranial Fossa
[Anterior Ethmoidal Artery
Posterior Ethmoidal Artery] ~ Ophthalmic Artery
[Middle Meningeal Artery] ~ Maxillary artery
Meningeal branch of ICA
Nerve supply to Middle Cranial Fossa
Mandibular Nerve
Maxillary Nerve
Nerve supply to Anterior Cranial Fossa
Ophthalmic Nerve
Maxillary Nerve
Mandibular Nerve
Nerve Supply to Posterior Cranial fossa
CN {7, 9, 10, 12}
C- 1, 2, 3, 4
