Object representations in ventral and dorsal visual streams: fMRI repetition effects depend on attention and part-whole configuration.

ABSTRACT: The effects of attention and object configuration on the neural responses to short-lag visual image repetition were investigated with fMRI. Attention to one of two object images in a prime display was cued spatially. The images were either intact or split vertically; a manipulation that negates the influence of view-based representations. A subsequent single intact probe image was named covertly. Behavioural priming observed as faster button presses was found for attended primes in both intact and split configurations, but only for uncued primes in the intact configuration. In a voxel-wise analysis, fMRI repetition suppression (RS) was observed in a left mid-fusiform region for attended primes, both intact and split, whilst a right intraparietal region showed repetition enhancement (RE) fo

SUBMITTER: Thoma V 

PROVIDER: S-EPMC3176913 | biostudies-literature | 2011 Jul

REPOSITORIES: biostudies-literature