Translated to english by "Ayelen Toranzo" and "Claudia Brusasca"
All the arterial vascularity in the brain depends on two arterial systems: The two internal carotid arteries in front, and the two vertebral arteries (vertebro-basilar system in back).
These four major axes are connected to each other at several levels, notably at the base of the brain by the Willis polygon.
This anastomotic circle functions as a safety system. If one of the axes is deficient, the blood supply of the others compensates for this reduction.
From this anastomotic circle, the main cerebral arteries are born.
The internal carotid arteries give rise to two essential branches:
the anterior cerebrum which vascularizes the internal part of the cerebral hemisphere, and the midbrain that vascularizes the lateralized portion of the hemisphere.
The two posterior vertebral arteries form a common trunk (the basillary trunk) which delivers arteries to the cerebral trunk and cerebellum.
It then divides to form the posterior cerebral arteries for the occipital lobe and the ventral part of the temporal lobe.
7 сен 2024
