title: Cytoarchitectonical analysis and probabilistic mapping of two extrastriate areas of the human posterior fusiform gyrus.
abstract: The human extrastriate visual cortex comprises numerous functionally defined areas, which are not identified in the widely used cytoarchitectonical map of Brodmann. The ventral part of the extrastriate cortex is particularly devoted to the identification of visual objects, faces and word forms. We analyzed the region immediately antero-lateral to hOc4v in serially sectioned (20 μm) and cell body-stained human brains using a quantitative observer-independent cytoarchitectonical approach to further identify the anatomical organization of the extrastriate cortex. Two novel cytoarchitectonical areas, FG1 and FG2, were identified on the posterior fusiform gyrus. The results of ten postmortem brains were then registered to their MRI volumes (acquired before histological processing), 3D reconstructed, and spatially normalized to the Montreal Neurological Institute reference brain. Finally, probabilistic maps were generated for each cytoarchitectonical area by superimposing the areas of the individual brains in the reference space. Comparison with recent functional imaging studies yielded that both areas are located within the object-related visual cortex. FG1 fills the gap between the retinotopically mapped area VO-1 and a posterior fusiform face patch. FG2 is probably the correlate of this face patch.
authors.affiliation: Institute of Neuroscience and Medicine (INM-1, INM-2), Research Centre Jülich, 52425, Jülich, Germany. j.caspers@fz-juelich.de
authors.forename: Julian
authors.initials: J
authors.lastname: Caspers
authors.forename: Karl
authors.initials: K
authors.lastname: Zilles
authors.forename: Simon B
authors.initials: SB
authors.lastname: Eickhoff
authors.forename: Axel
authors.initials: A
authors.lastname: Schleicher
authors.forename: Hartmut
authors.initials: H
authors.lastname: Mohlberg
authors.forename: Katrin
authors.initials: K
authors.lastname: Amunts
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001344:Autopsy; D015415:Biomarkers / Q000032:analysis; D001931:Brain Mapping / Q000379:methods; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D008953:Models, Anatomic; D015233:Models, Statistical; D009474:Neurons / Q000737:chemistry / Q000502:physiology*; D010364:Pattern Recognition, Visual; D014793:Visual Cortex / Q000737:chemistry / Q000166:cytology* / Q000502:physiology*; D014796:Visual Perception
chemical_list: D015415:Biomarkers