What is the middle cerebral artery (MCA)?

Updated: Aug 09, 2021
  • Author: Daniel I Slater, MD; Chief Editor: Stephen Kishner, MD, MHA  more...
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The MCA is by far the largest cerebral artery and is the vessel most commonly affected by cerebrovascular accident. The MCA supplies most of the outer convex brain surface, nearly all the basal ganglia, and the posterior and anterior internal capsules. Infarcts that occur within the vast distribution of this vessel lead to diverse neurologic sequelae. Understanding these neurologic deficits and their correlation to specific MCA territories has long been researched.

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