A 58-year-old woman with a history of hypertension presents with acute left-sided weakness and facial droop. Imaging reveals occlusion of the right middle cerebral artery (MCA) at its origin. Which feature of the circle of Willis would be the most critical determinant of whether she develops a major stroke versus a minor deficit?

See the options, answer & explanation

Sign in free to reveal the answer choices, the correct answer, the detailed explanation, and AI-powered insights for this question.