Enhanced inter-regional coupling of neural responses and repetition suppression provide separate contributions to long-term behavioral priming.

ABSTRACT: Stimulus identification commonly improves with repetition over long delays ("repetition priming"), whereas neural activity commonly decreases ("repetition suppression"). Multiple models have been proposed to explain this brain-behavior relationship, predicting alterations in functional and/or effective connectivity (Synchrony and Predictive Coding models), in the latency of neural responses (Facilitation model), and in the relative similarity of neural representations (Sharpening model). Here, we test these predictions with fMRI during overt and covert naming of repeated and novel objects. While we find partial support for predictions of the Facilitation and Sharpening models in the left fusiform gyrus and left frontal cortex, the data were most consistent with the Synchrony model, with in

SUBMITTER: Gotts SJ 

PROVIDER: S-EPMC8058068 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature