title: The neural basis of perceptual and conceptual word priming--a PET study.
abstract: Positron emission tomography scans were obtained in 13 normal subjects during perceptual and conceptual word priming tasks with the aim to investigate the neural system specific to the two priming conditions. In the prescan phase, subjects were primed perceptually or conceptually with two separate procedures, while in the scan phase, they performed the same stem completion task. Therefore we could compare the results of the two priming tasks in a direct manner. A fixation control task and a baseline task (completion of stems that did not correspond to previously seen words) were also given. A specific blood flow decrease was found in the left inferior temporal cortex in the perceptual word priming condition and in the left superior temporal / inferior parietal cortex in the conceptual word priming condition. Each blood flow change may reflect transient changes in the cortical areas subserving the processing of the perceptual and conceptual components of word priming.
authors.affiliation: Department of Neuropsychiatry, Osaka University Medical School, Suita, Japan. yasuno@psy.med.osaka-u.ac.jp
authors.forename: F
authors.initials: F
authors.lastname: Yasuno
authors.forename: T
authors.initials: T
authors.lastname: Nishikawa
authors.forename: H
authors.initials: H
authors.lastname: Tokunaga
authors.forename: K
authors.initials: K
authors.lastname: Yoshiyama
authors.forename: Y
authors.initials: Y
authors.lastname: Nakagawa
authors.forename: Y
authors.initials: Y
authors.lastname: Ikejiri
authors.forename: N
authors.initials: N
authors.lastname: Oku
authors.forename: K
authors.initials: K
authors.lastname: Hashikawa
authors.forename: H
authors.initials: H
authors.lastname: Tanabe
authors.forename: K
authors.initials: K
authors.lastname: Shinozaki
authors.forename: Y
authors.initials: Y
authors.lastname: Sugita
authors.forename: T
authors.initials: T
authors.lastname: Nishimura
authors.forename: M
authors.initials: M
authors.lastname: Takeda
mesh_terms: D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging / Q000502:physiology*; D001931:Brain Mapping; D002560:Cerebrovascular Circulation / Q000502:physiology; D006801:Humans; D007802:Language; D008297:Male; D010296:Parietal Lobe / Q000098:blood supply; D010465:Perception / Q000502:physiology*; D013702:Temporal Lobe / Q000098:blood supply; D014055:Tomography, Emission-Computed