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Anosognosia – Right Parietal Lesion — SCE Neurology MCQ

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ModerateCerebrovascular DiseaseAnosognosia – Right Parietal LesionSCE Neurology

A 65-year-old man with ischaemic stroke has left neglect and anosognosia (denial of his left hemiplegia). He insists his left arm works normally despite being unable to move it. What brain region is most commonly associated with anosognosia for hemiplegia?

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Correct answer: B — Right parietal lobe (inferior parietal lobule/temporoparietal junction)

Anosognosia for hemiplegia (denial of motor deficit) is most commonly associated with right hemisphere lesions, particularly involving the inferior parietal lobule, temporoparietal junction, and insular cortex. It reflects a failure of the brain's internal monitoring system to update its body schema after the stroke. It is more common and severe after right hemisphere strokes and often co-occurs with left neglect. A: Left frontal lesions cause aphasia. C: Left temporal lesions cause receptive aphasia. D: Occipital lesions cause visual field defects. E: Cerebellar lesions cause ataxia.

Reference: RCP National Clinical Guideline for Stroke (2023)