What does the superior sagittal sinus do?
The purpose of the superior sagittal sinus is to carry waste and fluids away from the brain as veins do throughout the rest of the body.
What is contained within the superior sagittal sinus?
The superior sagittal sinus is the largest of the venous sinuses (Fig. 39-6), and it receives blood from the frontal, parietal, and occipital superior cerebral veins and the diploic veins, which communicate with the meningeal veins.
Which sinus is affected during Tentorial tear?
The four major varieties of neonatal subdural hemorrhage include the following (Table 22.6): tentorial laceration with rupture principally of the straight sinus, transverse sinus, vein of Galen, or smaller infratentorial veins; occipital osteodiastasis with rupture of the occipital sinus; falx laceration with rupture …
What are the lateral venous lacunae?
The lateral lacunae are small openings that communicate with irregularly shaped venous spaces (venous lacunae) in the dura mater near the sinus. There are usually three lacunae on either side of the superior sagittal sinus: a small frontal, a large parietal, and an occipital, intermediate in size between the other two.
What is contained within the superior sagittal sinus in a sheep brain?
Now, note the superior sagittal sinus, a rostrocaudally running venous space that lies at the midline on the dorsal surface. This sinus collects much of the venous drainage from the hemisphere, and also represents the point at which cerebrospinal fluid empties into the vascular system.
Where does superior sagittal sinus drain?
The superior sagittal sinus drains the lateral aspects of the anterior cerebral hemispheres. [4] The superior sagittal sinus eventually progresses posteriorly to the confluence of sinuses where it terminates.
What structure creates the superior sagittal sinus of the brain?
The large superior sagittal sinus is a dural venous sinus created within the superior edge of the falx cerebri between the periosteal dura and meningeal dura. The superior sagittal sinus sweeps caudally and drains into the confluence of sinuses located at the occipital pole.
Which sinuses meet at the confluence of sinuses?
The confluence of sinuses (Latin: confluens sinuum), torcular Herophili, or torcula is the connecting point of the superior sagittal sinus, straight sinus, and occipital sinus. It is below the internal occipital protuberance of the skull. It drains venous blood from the brain into the transverse sinuses.
Which sinus does the straight sinus drain to?
transverse sinus
The straight sinus ends at the internal occipital protuberance, a bony landmark on the cranium, and empties into the transverse sinus contributing to the formation of the confluence of sinuses.
What are the dural venous sinuses?
The dural venous sinuses (DVSs) are endothelial-lined sinuses, which lie between the two layers of dura (meningeal and endosteal layers). They collect venous blood from the brain, meninges, and calvaria and deliver it to the internal jugular veins at the skull base. There are two groups of DVS.
What forms the inferior sagittal sinus?
The inferior sagittal sinus is formed within the free edge of the falx cerebri by the confluence of veins draining the falx cerebri and empties into the straight sinus. The sphenoparietal sinus connects both to the cavernous sinus and to the superior sagittal sinus.
What part of the brain contains lateral ventricles?
Lateral ventricles are two c-shaped cavities one on each side of cerebral hemisphere. It consists of a central part called body and three extensions: anterior (frontal horn), posterior (occipital horn), and inferior (temporal horn).
How do the lacunae communicate with the sagittal sinus?
The lacunae communicate with the sagittal sinus through small slit-like openings and often become confluent (single large lacuna) in the elderly. The lateral venous lacunae mostly receive the diploic veins of the skull and meningeal veins.
What does the superior sagittal sinus look like?
In cross-section, the superior sagittal sinus appears triangular with its apex pointing inferiorly and continuing downward as the falx cerebri. The sinus is narrow anteriorly and widens as it runs posteriorly. On either side of the superior sagittal sinus are lateral expansions within the dura mater referred to as the lateral venous lacunae.
What is the treatment for superior sagittal sinus?
In the chronic setting, however, gradual occlusion of the sinus allows for the development of collateral drainage vessels. Consequently, little or no symptoms may be perceived. Treatment typically involves the use of anticoagulants. Superior sagittal sinus: want to learn more about it?
What is thrombosis of the superior sagittal sinus?
Thrombosis of the superior sagittal sinus results in the obstruction of the sinus and impairment of venous drainage. It often occurs in individuals that are at higher risk of forming clots. The condition may either be acute or chronic.
