The term area 19a of Vogts refers to one of two parts of area 19 of Vogts based on cytoarchitecture and myeloarchitecture in the guenon. The authors regarded it as topologically homologous to area 19 of Mauss , but not to area 19 of Brodmann (guenon). The other part is area 19b of Vogts ( Vogts-1919 ).