The term area 6b beta of Vogts refers to a cytoarchitecturally defined subdivision of area 6 of Brodmann (guenon). It and area 6b alpha of Vogts constitute area 6b of Vogts. Area 6b beta differs from 6b alpha in that the internal granular layer (IV) is wider and more cellular, and in the internal pyramidal layer (V) the cellular sublayer (Va) is narrower while the acellular sublayer (Vb) is wider ( Vogts-1919 ).