Posterolateral View of the Left Hemisphere. A, Posterolateral view of the left hemisphere. The 3-gyrus pattern was identified in only 30% of the specimens, and in these cases the middle occipital gyrus seemed to be the most posterior part of the angular gyrus posterior to the parietooccipital-preoccipital line. Infrequently, the middle occipital gyrus exhibits a distinct configuration such as illustrated in this figure. B, The same specimen with highlighting distinguishing the superior occipital gyrus (green), inferior occipital gyrus (yellow), and middle occipital gyrus (blue). (Images courtesy of E de Oliveira)