Anton syndrome refers to visual anosognosia occurring with bilateral involvement of which artery infarction?

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Multiple Choice

Anton syndrome refers to visual anosognosia occurring with bilateral involvement of which artery infarction?

Anton syndrome is a form of cortical blindness with anosognosia, arising when both occipital lobes are damaged. The occipital lobes—where the primary visual cortex resides—receive their blood supply mainly from the posterior cerebral arteries. When infarction affects both posterior cerebral arteries, visual processing is lost at the cortical level even though the eyes are intact, leading to unawareness or denial of blindness and often confabulation. This pattern fits the question because bilateral PCA infarcts produce the cortical blindness that underpins Anton syndrome. Infarcts in the anterior cerebral artery would not primarily impair vision; middle cerebral artery strokes often cause motor or language deficits; basilar artery infarcts involve brainstem or cortical areas differently and do not classically produce this specific visual anosognosia.

Anton syndrome is a form of cortical blindness with anosognosia, arising when both occipital lobes are damaged. The occipital lobes—where the primary visual cortex resides—receive their blood supply mainly from the posterior cerebral arteries. When infarction affects both posterior cerebral arteries, visual processing is lost at the cortical level even though the eyes are intact, leading to unawareness or denial of blindness and often confabulation. This pattern fits the question because bilateral PCA infarcts produce the cortical blindness that underpins Anton syndrome. Infarcts in the anterior cerebral artery would not primarily impair vision; middle cerebral artery strokes often cause motor or language deficits; basilar artery infarcts involve brainstem or cortical areas differently and do not classically produce this specific visual anosognosia.

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