title: On hierarchies: response to Hilgetag et al.
authors.affiliation: Washington University School of Medicine, St. Louis, MO 63110, USA.
authors.forename: D C
authors.initials: DC
authors.lastname: Van Essen
authors.forename: D J
authors.initials: DJ
authors.lastname: Felleman
mesh_terms: D000465:Algorithms; D000818:Animals; D001931:Brain Mapping; D008251:Macaca; D009415:Nerve Net / Q000033:anatomy & histology*; D014793:Visual Cortex / Q000033:anatomy & histology* / Q000502:physiology; D014795:Visual Pathways / Q000033:anatomy & histology*