title: Different roles of the left and right parahippocampal regions in verbal recognition: a PET study.
abstract: We examined the role of the parahippocampal regions in humans during two types of verbal recognition process, i.e. delayed matching and non-matching, by measuring regional cerebral blood flow (rCBF) using PET. The results showed differential activation of each parahippocampal region during verbal memory tasks in which the side activated shifted depending on the nature of the task employed; an increase in rCBF in the left parahippocampal gyrus was associated with retrieval strategy of non-matching, and an increase in rCBF in the right parahippocampal gyrus was associated with retrieval strategy of matching. We conclude that lateralized parahippocampal activation may depend on the type of response required.
authors.affiliation: Department of Neuropsychology, Tohoku University Graduate School of Medicine, Aoba-ku, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Fujii
authors.forename: J
authors.initials: J
authors.lastname: Okuda
authors.forename: R
authors.initials: R
authors.lastname: Kawashima
authors.forename: A
authors.initials: A
authors.lastname: Yamadori
authors.forename: R
authors.initials: R
authors.lastname: Fukatsu
authors.forename: K
authors.initials: K
authors.lastname: Suzuki
authors.forename: M
authors.initials: M
authors.lastname: Ito
authors.forename: R
authors.initials: R
authors.lastname: Goto
authors.forename: H
authors.initials: H
authors.lastname: Fukuda
mesh_terms: D000293:Adolescent; D000328:Adult; D007839:Functional Laterality / Q000502:physiology*; D006624:Hippocampus / Q000000981:diagnostic imaging / Q000502:physiology*; D006801:Humans; D008297:Male; D011939:Mental Recall / Q000502:physiology*; D015203:Reproducibility of Results; D014055:Tomography, Emission-Computed; D014706:Verbal Learning / Q000502:physiology*