Question

question 38 (mandatory) (2 points) a 35 - year - old woman with mitral stenosis and atrial fibrillation suddenly develops left - sided paralysis. it is diagnosed to be due to a cerebral embolism. such an embolus most commonly impacts in a branch of the: vertebral artery anterior cerebral artery posterior cerebral artery middle cerebral artery

Explanation:

In cases of cerebral embolism leading to sudden - onset neurological deficits like left - sided paralysis, the middle cerebral artery is the most commonly affected vessel. This is because of its relatively large size and the direction of blood flow from the heart (where emboli often originate in patients with mitral stenosis and atrial fibrillation) towards the brain. The middle cerebral artery supplies a large portion of the lateral surface of the cerebral hemisphere, and occlusion can cause significant motor and sensory deficits.

Answer:

D. middle cerebral artery