Question 5
The primary visual cortex in the medial occipital lobe is supplied by cortical branches of which major cerebral artery?
In some but not all individuals, the posterior tips of the occipital lobes are in the border zone formed between which two major cerebral arteries?
What is functionally important about this particular part of the primary visual cortex?
Answer to Question 5
Correct Answer to Question a:
The medial occipital lobe is supplied by cortical branches of PCA. 
Correct Answer to Question b:
The tips of the occipital lobes are sometimes in the MCA-PCA border zone (other times they are entirely in PCA territory). 
Correct Answer to Question c:
This is the region of the primary visual cortex in which objects at the center of vision (objects that fall on the macula of the retina) are represented; thus certain individuals may suffer a PCA occlusion and yet retain central vision (so-called 'macular sparing' ).