Dural Sinuses Flashcards
Endothelium-lined spaces between the periosteal and meningeal layers of the dura
Dural venous sinuses
Where do most blood from the brain ultimately drain into?
IJV
This sinus lies in the convex attached border of the falx cerebri
Superior sagittal sinus
A meeting place of the superior sagittal, straight, occipital, and transverse sinuses
Confluence of sinuses
Receives the superior cerebral veins
Superior sagittal sinus
Prolongation of the arachnoid that protrude through the meningeal layer of the dura mater into dural venous sinuses
Arachnoid granulations
Lateral expansions of the superior sagittal sinus
Lateral venous lacunae
Enlarged arachnoid granulations may form pits in calvaria
Granular foveolae
Other name for enlarged arachnoid granulations
Pacchionian bodies
Structurally adapted for the transport of cerebrospinal fluid from the subarachnoid space to the venous system
Arachnoid granulations
Much smaller than the superior sagittal sinus
Inferior sagittal sinus
Formed by the union of the inferior sagittal sinus with the great cerebral vein
straight sinus
Forms a groove in the Occipital bones
Transverse sinus
Which transverse sinus is larger?
Left sinus is dominant
Follow S-shaped courses in the posterior cranial fossa
Sigmoid sinus
Lies in the attached border of the falx cerebelli
Occipital sinus
The occipital sinus communicates inferiorly with the
Internal vertebral venous plexus
Large venous plexuses located on each side of the sella turcica
Cavernous sinuses
Receives blood from superior and inferior ophthalmic veins, superficial middle cerebral vein, sphenoparietal sinus
Cavernous sinus
Venous channels anterior and posterior to the stalk of the pituitary gland
Intracavernous sinuses
The cavernous sinuses drain postero-inferiorly through the superior and inferior
Petrosal sinuses and emissary veins to basilar and pterygoid plexuses
Inside each cavernous sinus is the
Internal carotid artery
Nerves inside cavernous sinus
Abducent 2
Oculomotor 3
Trochlear 4
Trigeminal 5 (1,2)
