Infarction of which artery classically involves brainstem, cerebellar, or posterior cerebral territory?

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Multiple Choice

Infarction of which artery classically involves brainstem, cerebellar, or posterior cerebral territory?

This question is about where stroke occurs based on the artery’s supply. The basilar artery runs along the ventral brainstem and sends branches to the brainstem and cerebellum, with potential involvement of posterior circulation territories through its terminal branches. When this artery is infarcted, you typically see brainstem signs (cranial nerve dysfunction, long-tract signs) and cerebellar signs (ataxia), reflecting its primary supply to these areas. Infarcts of the posterior cerebral, middle cerebral, or anterior cerebral arteries primarily affect cortical regions of the cerebral hemispheres (occipital/temporal for PCA, lateral cortex for MCA, medial frontal/parietal for ACA) and not the brainstem or cerebellum. Therefore, basilar artery infarction best fits the vignette describing brainstem, cerebellar, or posterior cerebral territory involvement.

This question is about where stroke occurs based on the artery’s supply. The basilar artery runs along the ventral brainstem and sends branches to the brainstem and cerebellum, with potential involvement of posterior circulation territories through its terminal branches. When this artery is infarcted, you typically see brainstem signs (cranial nerve dysfunction, long-tract signs) and cerebellar signs (ataxia), reflecting its primary supply to these areas. Infarcts of the posterior cerebral, middle cerebral, or anterior cerebral arteries primarily affect cortical regions of the cerebral hemispheres (occipital/temporal for PCA, lateral cortex for MCA, medial frontal/parietal for ACA) and not the brainstem or cerebellum. Therefore, basilar artery infarction best fits the vignette describing brainstem, cerebellar, or posterior cerebral territory involvement.

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