The term Subregio praecingularis refers to a composite cytoarchitecturally defined portion of the cingulate region. It is a composite substructure that includes the areas of the region that lack a well developed internal granular layer (IV). Its boundary with the Subregio postcingularis is located at about the anterior-posterior level of the central sulcus. It includes the area 25 of Brodmann (human), the area 33 of Brodmann, the area 32 of Brodmann (human) and the area 24 of Brodmann (human) ( Brodmann-1909 ).