Fronto-parietal network supports context-dependent speech comprehension
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Date
2014-10
Major/Subject
Mcode
Degree programme
Language
en
Pages
11
293-303
293-303
Series
NEUROPSYCHOLOGIA, Volume 63
Abstract
Knowing the context of a discourse is an essential prerequisite for comprehension. Here we used functional magnetic resonance imaging (fMRI) to disclose brain networks supporting context-dependent speech comprehension. During fMRI, 20 participants listened to 1-min spoken narratives preceded by pictures that were either contextually matching or mismatching with the narrative. Matching pictures increased narrative comprehension, decreased hemodynamic activity in Broca׳s area, and enhanced its functional connectivity with left anterior superior frontal gyrus, bilateral inferior parietal cortex, as well as anterior and posterior cingulate cortex. Further, the anterior (BA 45) and posterior (BA 44) portions of Broca׳s area differed in their functional connectivity patterns. Both BA 44 and BA 45 have shown increased connectivity with right angular gyrus and supramarginal gyrus. Whereas BA 44 showed increased connectivity with left angular gyrus, left inferior/middle temporal gyrus and left postcentral gyrus, BA 45 showed increased connectivity with right posterior cingulate cortex, right anterior inferior frontal gyrus, lateral occipital cortex and anterior cingulate cortex. Our results suggest that a fronto-parietal functional network supports context-dependent narrative comprehension, and that Broca׳s area is involved in resolving ambiguity from speech when appropriate contextual cues are lacking.Description
Keywords
Broca׳s area, Wernicke׳s area, fMRI, PPI, ISC, Functional connectivity, Narrative, Speech comprehension
Other note
Citation
Smirnov, D, Glerean, E, Lahnakoski, J M, Salmi, J, Jääskeläinen, I P, Sams, M & Nummenmaa, L 2014, ' Fronto-parietal network supports context-dependent speech comprehension ', Neuropsychologia, vol. 63, pp. 293-303 . https://doi.org/10.1016/j.neuropsychologia.2014.09.007