Brodmann area 27
Brodmann area 27 is a cytoarchitecturally defined cortical area that is a rostral part of the parahippocampal gyrus. It is commonly regarded as a synonym of presubiculum.
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.