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Repetition effects elicited by objects and their contexts: An fMRI study

Tsivilis, D; Otten, LJ; Rugg, MD; (2003) Repetition effects elicited by objects and their contexts: An fMRI study. HUM BRAIN MAPP , 19 (3) 145 - 154. 10.1002/hbm.10116.

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Abstract

Event-related fMRI responses were recorded during a recognition memory test for previously studied visual objects. Some studied objects were superimposed on the same context (landscape scenes) as at study, some were superimposed on a different studied context, and some were paired with new contexts. Unstudied objects were paired with either a studied or a new context. Relative to all other stimulus classes, test stimuli where both components were unstudied elicited enhanced responses in lateral and ventral extrastriate visual cortex. This effect, which is analogous to a previously described electrophysiological result obtained with the same experimental procedure, had the same magnitude regardless of whether a test item was composed of one or two studied components, or whether a single studied component was task relevant or task irrelevant. The findings point to the existence of repetition-sensitive neural mechanisms that operate in a non-linear manner. (C) 2003 Wiley-Liss, Inc.

Type:Article
Title:Repetition effects elicited by objects and their contexts: An fMRI study
DOI:10.1002/hbm.10116
Keywords:objects, repetition effects, fMRI, EVENT-RELATED FMRI, RECOGNITION MEMORY, RETRIEVAL, CORTEX, WORDS, BRAIN
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Psychology and Language Sciences (Division of) > Institute of Cognitive Neuroscience
UCL > School of Life and Medical Sciences > Faculty of Life Sciences

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