On the back end, look at meningeal vessels in wall of the proximal superior sagittal sinus in patient with a torcular fistula. Here is an example - note how the anterior meningeal splits into two as the SSS becomes larger Again, there is a balance here - sometimes anterior meningeal is large, while convexity MMA supply is smaller. Often the anterior meningeal is obscured by the ACA in frontal viewsĭoes not have to be in setting of craniotomy either. There is even a meningeal blush in parenchymal phase (black arrows).
See the anterior meningeal bifurcate into two branches (white arrows), one on each side of the SSS. Here is a big one in a patient post pterional craniotomy. Contiguous with the “Superior Sagittal Sinus” artery (v) - the anastomotic channel running along the entire SSS. Usually does not extend beyond anterior frontal convexity, except when middle meningeal arteries are compromised (surgically most often). Runs in the wall of the distal superior sagittal sinus - in fact it is the only named artery that travels in the sinus wall. Like any branch, variably well- or under-developed. Here and elsewhere on we name them according to location such as “superior sagittal sinus artery” or “sigmoid sinus artery”.Īnterior Meningeal Artery (r)– branch of the ethmoid arteries (q), which are in turm branches of the ophthalmic (n). Despite their importance they have no consistent names. Particuarly important are arteries in the walls of dural sinuses, which are the principal connecting anastomotic routes between meningeal arteries and which play key roles in anatomy of dural fistulas for example. There is tremendous collateral potential between anterior, middle, posterior meningeal arteries, as well as MHT and PCA for example that often contribute to dural vascularization. For specific information on individual vessels contributing to the network, see Ophthalmic, Middle Meningeal, and Posterior Meningeal Pages.Īs you see in figure above, it is best to think of meningeal arteries as a network. The meninges are a highly collateralized vascular network, a critical factor in successful treatment of diseases that involve meninges, such as dural fistulas or subdural hematomas. The point is that there is more to the meninges than the Middle Meningeal Artery. This is an “umbrella page” for meningeal arterial and venous vascular networks.
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