Border-zone infarct in the region between the territory of two major arteries that supply the brain (watershed area)
Cerebral watershed areas
MRI head (A and B: FLAIR; a.and b.; DWI) Cortical border zones, or watershed areas (A; blue), are located between the ACA and MCA territories and the PCA and MCA territories. A left occipital infarct (a; white) is shown at the boundary between the middle and posterior cerebral territories.
Internal border zones (B; red) are located between the superficial and deep branches of the MCA. A left internal watershed infarct (b; white) is shown.
