title: Moving tactile stimuli of fingers are integrated in the intraparietal and inferior parietal cortices.
abstract: When two cylinders are passively moved in-phase on the volar surface of the right second and third fingers, human subjects estimate the stimuli to originate from one object, whereas two separate objects are estimated for out-of-phase stimuli. While five blindfolded subjects performed this estimation task, brain activity was measured by fMRI. The in-phase stimuli activated the left intraparietal and inferior parietal areas significantly more than did out-of-phase stimuli. These parietal regions may play important roles in the integration of moving tactile stimuli that are independently provided on plural fingers, from which subjects internally construct a single object.
authors.affiliation: Faculty of Human Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501 Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Kitada
authors.forename: Takanori
authors.initials: T
authors.lastname: Kochiyama
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Hashimoto
authors.forename: Eiichi
authors.initials: E
authors.lastname: Naito
authors.forename: Michikazu
authors.initials: M
authors.lastname: Matsumura
mesh_terms: D000328:Adult; D001931:Brain Mapping; D005385:Fingers / Q000294:innervation / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009038:Motion; D010296:Parietal Lobe / Q000033:anatomy & histology / Q000502:physiology*; D010812:Physical Stimulation / Q000379:methods; D012016:Reference Values; D014110:Touch / Q000502:physiology*