Object identification leads to a conceptual broadening of object representations in lateral prefrontal cortex.

ABSTRACT: Recent experience identifying objects leads to later improvements in both speed and accuracy ("repetition priming"), along with simultaneous reductions of neural activity ("repetition suppression"). A popular interpretation of these joint behavioral and neural phenomena is that object representations become perceptually "sharper" with stimulus repetition, eliminating cells that are poorly stimulus-selective and responsive and reducing support for competing representations downstream. Here, we test this hypothesis in an fMRI-adaptation experiment using pictures of objects. Prior to fMRI, participants repeatedly named a set of object pictures. During fMRI, participants viewed adaptation sequences composed of rapidly repeated objects (3-6 repetitions over several seconds) that were either nam

SUBMITTER: Gotts SJ 

PROVIDER: S-EPMC4424186 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature