brodmann area 27 brodmann area 27 area 27 of brodmann-1909 is a cytoarchitecturally defined cortical area that is a rostral part of the parahippocampal gyrus. it is commonly regarded as a synonym of presubiculum. brodmann area 27medial surface of the brain with brodmann's areas numbered.detailsidentifierslatinarea praesubicularisneuronames1039neurolex idbirnlex_1758fma68624anatomical terms of neuroanatomy the dorsal part of the presubiculum is more commonly known as the postsubiculum and is of interest because it contains head direction cells, which are responsive to the facing direction of the head.