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Middle cerebral artery - Definition


The middle cerebral artery (MCA) is a branch of the internal carotid artery. There is then one on each side of the brain. They are found in the lateral fissure of Sylvius, a trough which separates the lobes of the brain. MCAs enable blood to reach the deeper, and more superficial, areas of the brain, in particular a large part of the surface of the hemispheres. In the case of the obstruction of the MCA, it is a sylvian infarction which is the consequence of brain failure, responsible for the symptoms of stroke: the main signs of stroke in this area are major or minor hemiplegia, aphasia, apraxia, or specific vision problems.