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The middle cerebral artery territory is the most commonly
affected territory in a cerebral infarction, due to the size of the territory
and the direct flow from the internal carotid artery into the middle cerebral
artery, providing the easiest path for thromboembolism.
The neurological deficit will depend on the extent of the infarct and hemispheric dominance, and include:
- contralateral hemiparesis
- contralateral hemisensory loss
- hemianopia
- aphasia: if the dominant hemisphere is involved; may be expressive in anterior MCA territory infarction, receptive in posterior MCA stroke, or global with extensive infarction
- neglect: non-dominant hemisphere.
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