Existence of this system in humans is inferential. depolarization-induced release of neurotransmitter into the wall of the cerebral blood vessel occurs. A cerebral aneurysm is the dilation, bulging, or ballooning of part of the wall of a vein or artery in the brain. Cerebral aneurysms can occur at any age. An AVM puts extreme pressure on the thin and weak walls of the blood vessels. A bulge in a blood vessel wall (aneurysm) may develop and become. vascular wall enhancement had fewer headache attacks than those without (p = ). Follow-up imaging completed in 14 patients (median. Arterial Disease · Carotid artery disease is a blockage or narrowing in the arteries supplying the brain, and can lead to a transient ischemic attack (TIA) or. There are four main arteries that supply blood flow to the brain. Dissection occurs when a tear in the artery wall allows blood to leak. In medicine, the word “vascular” refers to blood vessels, or the tubes that contain and transport our blood, making up our circulation system. This system of. They supply blood to your brain. A dissection is a tear of the inner layer of the wall of an artery. The tear lets blood get in between the layers of the. Spontaneous vascular injury occurs without an external blow or sudden movement and is related to an inherent or natural defect in the wall. In blood vessel walls, multiple ligand–receptor systems and junctional protein this causes higher brain centers to trigger neurotransmitter release.