A systematic review of brain imaging studies of semantic priming / Revisão sistemática de estudos de neuroimagem do priming semântico

ABSTRACT

The present systematic review aims to address the contribution of brain imaging studies to the investigation of semantic priming (SP). Only studies from 2001 to 2017 using lexical decision tasks with visual and auditory stimuli, were considered. The review resulted in 20 articles, which showed semantic priming effects (SPE) in several brain areas (frontal and temporal lobes, cingulate gyrus, supplementary motor areas, and parietal cortex). In this way, the identification of activation in these areas varied as a function of stimulus onset asynchrony (SOA). Data suggests both hemispheres are involved on SPE, with a more robust role of the left hemisphere. Specifically, a decreased activation on the left middle temporal gyrus was found to be related to automatic SPE. This same area seemed to be related to SPE at long SOAs, along with the left inferior frontal gyrus and the anterior cingulated cortex. Therefore, a strong performance of the left hemisphere in semantic priming tasks could be observed, especially in the left middle temporal gyrus. Its activation was modulated by short and long intervals between stimuli, with more activation associated with longer intervals.