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Summary
Occipital lobe strokes (infarctions) can cause hemiparesis (weakness on one side of the body). This study suggests small vessel disease in the posterior cerebral artery may explain this weakness, even without other stroke indicators.
Area of Science:
- Neurology
- Neuroimaging
- Vascular Neurology
Background:
- Posterior cerebral artery (PCA) infarctions typically affect visual processing.
- Hemiparesis is an uncommon presentation of isolated PCA infarction.
Purpose of the Study:
- To investigate the cause of hemiparesis in patients with CT-verified occipital lobe infarction.
- To explore potential underlying mechanisms for hemiparesis in the absence of middle or anterior cerebral artery involvement.
Main Methods:
- Retrospective analysis of 71 patients with CT-confirmed PCA territory infarction.
- Clinical data review focusing on neurological deficits, particularly hemiparesis and brainstem symptoms.
- Exclusion of concomitant infarctions in the middle or anterior cerebral artery territories.
Main Results:
- Seventeen out of 71 patients (24%) presented with hemiparesis associated with occipital infarction.
- No brainstem symptoms or concurrent infarctions in MCA/ACA territories were observed in these patients.
- No clear etiology for the hemiparesis was identified through standard evaluation.
Conclusions:
- Isolated occipital lobe infarction can manifest as hemiparesis.
- Lesions affecting small penetrating branches of the PCA are a potential explanation for this presentation.
- Further investigation into small vessel disease within the PCA territory is warranted.