Parallel versus serial processing dependencies in the perisylvian speech network: A Granger analysis of intracranial EEG data

David W. Gow, Corey J. Keller, Emad N. Eskandar, Nate Meng, Sydney S. Cash

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In this work, we apply Granger causality analysis to high spatiotemporal resolution intracranial EEG (iEEG) data to examine how different components of the left perisylvian language network interact during spoken language perception. The specific focus is on the characterization of serial versus parallel processing dependencies in the dominant hemisphere dorsal and ventral speech processing streams. Analysis of iEEG data from a large, 64-electrode grid implanted over the left perisylvian region in a single right-handed patient showed a consistent pattern of direct posterior superior temporal gyrus influence over sites distributed over the entire ventral pathway for words, non-words, and phonetically ambiguous items that could be interpreted either as words or non-words. For the phonetically ambiguous items, this pattern was overlayed by additional dependencies involving the inferior frontal gyrus, which influenced activation measured at electrodes located in both ventral and dorsal stream speech structures. Implications of these results for understanding the functional architecture of spoken language processing and interpreting the role of the posterior superior temporal gyrus in speech perception are discussed.

Original languageEnglish (US)
Pages (from-to)43-48
Number of pages6
JournalBrain and Language
Volume110
Issue number1
DOIs
StatePublished - Jul 1 2009
Externally publishedYes

Fingerprint

Language
spoken language
patient's rights
Implanted Electrodes
Speech Perception
Patient Rights
Prefrontal Cortex
causality
Causality
activation
Electrodes
language
Dependency (Psychology)
Electrocorticography
Nonwords
Electroencephalogram
Wernicke Area
Granger Causality
Hemisphere
Speech Processing

Keywords

  • Dual pathway model
  • Electrophysiology
  • Functional connectivity
  • Granger causality
  • iEEG
  • Intracranial recording
  • Speech perception
  • Spoken word recognition

ASJC Scopus subject areas

  • Language and Linguistics
  • Experimental and Cognitive Psychology
  • Linguistics and Language
  • Cognitive Neuroscience
  • Speech and Hearing

Cite this

Parallel versus serial processing dependencies in the perisylvian speech network : A Granger analysis of intracranial EEG data. / Gow, David W.; Keller, Corey J.; Eskandar, Emad N.; Meng, Nate; Cash, Sydney S.

In: Brain and Language, Vol. 110, No. 1, 01.07.2009, p. 43-48.

Research output: Contribution to journalArticle

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