title: The relationship between retrieval success and task performance during the recognition of meaningless shapes: an event-related near-infrared spectroscopy study.
abstract: Retrieval success of episodic memory has been studied intensively through the investigation of old/new effects. Recognized stimuli used in event-related functional magnetic resonance imaging studies on old/new effects have been words and visual materials which can evoke semantic associations. To elucidate the neural basis of retrieval success uninfluenced by semantic processing, we investigated the correlation between old/new effects and task performance during the recognition of meaningless shapes, by using event-related near-infrared spectroscopy. Forty-two right-handed subjects made recognition judgments about old (studied) or new (unstudied) meaningless shapes. The old/new effects of the shapes were positively correlated with task performance in the bilateral inferior lateral parietal cortex (ILP), but predominantly in the left ILP. This finding indicated that the ILP was directly associated with retrieval success and its lateralization was consistently left-sided irrespective of the type of stimulus.
authors.affiliation: Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. sane26@pediatr.med.kyushu-u.ac.jp
authors.forename: Masafumi
authors.initials: M
authors.lastname: Sanefuji
authors.forename: Taisuke
authors.initials: T
authors.lastname: Nakashima
authors.forename: Ryutaro
authors.initials: R
authors.lastname: Kira
authors.forename: Mariko
authors.initials: M
authors.lastname: Iwayama
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Torisu
authors.forename: Yasunari
authors.initials: Y
authors.lastname: Sakai
authors.forename: Toshiro
authors.initials: T
authors.lastname: Hara
mesh_terms: D000328:Adult; D001244:Association; D001931:Brain Mapping / Q000379:methods; D002540:Cerebral Cortex / Q000033:anatomy & histology / Q000502:physiology*; D003071:Cognition / Q000502:physiology; D004292:Dominance, Cerebral / Q000502:physiology; D005071:Evoked Potentials / Q000502:physiology*; D005260:Female; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008297:Male; D008568:Memory / Q000502:physiology*; D011939:Mental Recall / Q000502:physiology; D009483:Neuropsychological Tests; D010296:Parietal Lobe / Q000033:anatomy & histology / Q000502:physiology; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology; D011930:Reaction Time / Q000502:physiology; D019265:Spectroscopy, Near-Infrared / Q000379:methods*