The Dynamics of Language Network Interactions in Lexical Selection: An Intracranial EEG Study.

ABSTRACT: Speaking in sentences requires selection from contextually determined lexical representations. Although posterior temporal cortex (PTC) and Broca's areas play important roles in storage and selection, respectively, of lexical representations, there has been no direct evidence for physiological interactions between these areas on time scales typical of lexical selection. Using intracranial recordings of cortical population activity indexed by high-gamma power (70-150 Hz) modulations, we studied the causal dynamics of cortical language networks while epilepsy surgery patients performed a sentence completion task in which the number of potential lexical responses was systematically varied. Prior to completion of sentences with more response possibilities, Broca's area was not only more active

SUBMITTER: Wang Y 

PROVIDER: S-EPMC7945024 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature