Spatiotemporal dynamics of word retrieval in speech production revealed by cortical high-frequency band activity
Abstract
Word retrieval is essential to language production, relying on the activation of conceptual and word representations in memory followed by the selection of the correct word. The detailed spatiotemporal cortical dynamics of this core language process are not well-known. By using direct cortical recordings, we show that the activation of concepts or word representations and their selection co-occur in time and engage widespread brain networks and overlapping brain regions. In contrast with modular brain models of language production, our data do not support a clear division of labor between brain regions during these early stages of language production. Rather, we suggest that overlapping brain mechanisms optimize word retrieval.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 22, 2017
- Source ID
- 10.1073/pnas.1620669114
Entities
People
- Alex Clarke
- David King-stephens
- Gerwin Schalk
- Jack J Lin
- Josef Parvizi
- Kenneth D. Laxer
- Kurtis I. Auguste
- Nathan E. Crone
- Nina F. Dronkers
- Peter B. Weber
- Peter Brunner
- Rachel A. Kuperman
- Robert T. Knight
- Rummit K. Dhillon
- Stéphanie Riès
Organizations
- Army Research Office
- California Pacific Medical Center
- Helen Wills Neuroscience Institute
- Johns Hopkins University
- National Institute of Neurological Disorders and Stroke
- National Institute on Deafness and Other Communication Disorders
- National Institutes of Health
- National Science Foundation
- New York State Department of Health
- San Diego State University
- Stanford University
- UCSF Benioff Children's Hospital Oakland
- United States Department of Veterans Affairs
- University of California
- University of California, Davis
- University of Cambridge