Parasagittal section of the head showing the disposition of the falx cerebri and tentorium cerebelli.
The cerebral dura materThe cerebral dura mater, its reflections and major venous sinuses
Part of cranial cavitysection of the head showing the disposition of the falx cerebri, together with some of the dural venous sinuses and subarachnoid cisterns.
Dural reflections and venous sinuses. The midbrain occupies the tentorial notch.
Tentorium cerebelliThe dura mater of the floor of the cranial cavity and the superior aspect of the tentorium cerebelli.Representation of the cavernous sinus and its venous relationships are greatly simplified and are shown on the left only. Note that the trochlear and abducens nerves have not been shown
Venous sinuses on the base of the skull. Thedura mater has been removed on the rightside. The inset indicateswhere groovesfor sinuses areseen on the dryskull. Note: On the left, the midbrain is seen at the level of thetentorial notch.On the right, a lower level section shows the trigeminalnerve attached to the pons.
Dural venous sinusesSingle PairedSuperior sagittal S. Sphenoparietal S.Infreior sagittal S. Cavernous S.Straight S. Superior petrosal S.Intercavernous Ss. Inferior petrosal S.Basilar venous plexsus Transverse S.Occipital S. Sigmoid S.
Coronal SectionSubarachnoid Villi and Emissary Vein Granulations Endosteal Layer Meningeal Layer Venous Sinus Cerebral Vein Pia Arachnoid
Single Dural Venous Sinuses Superior Sagittal Sinus Inferior Sagittal Sinus Straight Sinus Intercavernous Sinuses Occipital Sinus Basilar Plexus of Sinuses
5- Transverse Sinus Posterior Temporal Diploic The superior petrosal Vein sinus in s ve ll ar be Cere Inferior cerebral The occipital sinus veins Occipital Diploic Vein The Transverse sinus
Sigmoid Sinus Communication with Suboccipital plexus of veins Occipital Sinus Communication with Occipital and / or Posterior auricular veins6- Sigmoid Sinus
Intracranial HemorrahgeExtradural hemorrahge Subarachnoid hemorrageArterial or venous Results from leakage or ruptureResults from injury to the of a congenital aneurysm on themeningeal arteries or veins circle of Willis or angioma Cerebral hemorrage Subdural hemorrahge Results from rupture of one ofVenous the intracerebral thin walledResults from injury to the arteries (lenticulostriate artery)superficial superior cerebralveins