Spectro-temporal correlates of lexical access during auditory lexical decision.

ABSTRACT: Lexical access during speech comprehension comprises numerous computations, including activation, competition, and selection. The spatio-temporal profile of these processes involves neural activity in peri-auditory cortices at least as early as 200 ms after stimulation. Their oscillatory dynamics are less well understood, although reports link alpha band de-synchronization with lexical processing. We used magnetoencephalography (MEG) to examine whether these alpha-related oscillations reflect the speed of lexical access, as would be predicted if they index lexical activation. In an auditory semantic priming protocol, monosyllabic nouns were presented while participants performed a lexical decision task. Spatially-localizing beamforming was used to examine spectro-temporal effects in left a

SUBMITTER: Brennan J 

PROVIDER: S-EPMC4104786 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature