- Watershed infarcts result from severe hypotensive insults.
- They occur in areas with relatively poor blood supply at the boundaries between territories of cerebral arteries or their branches.
- Cortical border zone infarctions
- Internal border zone infarctions
CORTICAL BORDER ZONE INFARCTIONS
- Occur between the territories supplied by the anterior, middle and posterior cerebral arteries
INTERNAL BORDER ZONE INFARCTIONS
- Occur between the territories of the penetrating arteries arising from:
- Superficial pial venous plexus
- Basal cerebral arteries (deep)
- Infarcts occur in the corona radiata and the centrum semiovale adjacent to the lateral ventricles