Neuroanatomy · NEET PG Preparation Anatomy
A 52-year-old man presents with left-sided homonymous hemianopia with macular sparing. An ischemic stroke is diagnosed. The arterial occlusion most l…
Practice question from Neuroanatomy (NEET PG Preparation Anatomy), with the correct answer and a step-by-step solution.
medium · MCQ · Q-9CD064
A 52-year-old man presents with left-sided homonymous hemianopia with macular sparing. An ischemic stroke is diagnosed. The arterial occlusion most likely involves which of the following vessels?
- A.Left middle cerebral artery
- B.Right posterior cerebral arteryCorrect answer
- C.Left posterior cerebral artery
- D.Right middle cerebral artery
Solution
Homonymous hemianopia contralateral to the lesion involves the visual cortex. Macular sparing occurs due to dual blood supply from both the posterior cerebral artery (PCA) and middle cerebral artery (MCA) to the occipital pole. A lesion in the right PCA results in left-sided homonymous hemianopia with macular sparing.
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