title: Functional MRI of macaque monkeys performing a cognitive set-shifting task.
abstract: Functional brain organization of macaque monkeys and humans was directly compared by functional magnetic resonance imaging. Subjects of both species performed a modified Wisconsin Card Sorting Test that required behavioral flexibility in the form of cognitive set shifting. Equivalent visual stimuli and task sequence were used for the two species. We found transient activation related to cognitive set shifting in focal regions of prefrontal cortex in both monkeys and humans. These functional homologs were located in cytoarchitectonically equivalent regions in the posterior part of ventrolateral prefrontal cortex. This comparative imaging provides insights into the evolution of cognition in primates.
authors.affiliation: Department of Physiology, Department of Neurology, The University of Tokyo School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Nakahara
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Hayashi
authors.forename: Seiki
authors.initials: S
authors.lastname: Konishi
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Miyashita
mesh_terms: D000818:Animals; D001931:Brain Mapping; D003071:Cognition; D003463:Cues; D017352:Echo-Planar Imaging; D006801:Humans; D008251:Macaca; D008279:Magnetic Resonance Imaging; D009483:Neuropsychological Tests; D010296:Parietal Lobe / Q000033:anatomy & histology / Q000502:physiology; D010775:Photic Stimulation; D017397:Prefrontal Cortex / Q000033:anatomy & histology / Q000502:physiology*; D011597:Psychomotor Performance