Fast dynamics of cortical functional and effective connectivity during word reading.

ABSTRACT: We describe for the first time the fast dynamics of functional and effective (causal) connectivity during word reading. Independent component analysis of high-density EEG recorded during a word reading task recovered multiple sources of electrical brain activity previously identified by fMRI and PET. Results confirmed the ventral occipito-temporal cortex (vOT) as a central hub for word reading, showing a progression of theta-band (3-7 Hz) and gamma-band (30-50 Hz) phase synchronization and directed theta-band and gamma-band information flow with both early visual areas and high-level language-processing areas. These results highlight the interplay between local and long-distance neural dynamics involved at each stage of the reading process. Moreover, these measures of functional and causal

SUBMITTER: Bedo N 

PROVIDER: S-EPMC3925174 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature