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Articles, Behavioral/Systems/Cognitive

Spoken Word Memory Traces within the Human Auditory Cortex Revealed by Repetition Priming and Functional Magnetic Resonance Imaging

Pierre Gagnepain, Gael Chételat, Brigitte Landeau, Jacques Dayan, Francis Eustache and Karine Lebreton
Journal of Neuroscience 14 May 2008, 28 (20) 5281-5289; DOI: https://doi.org/10.1523/JNEUROSCI.0565-08.2008
Pierre Gagnepain
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Gael Chételat
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Brigitte Landeau
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Jacques Dayan
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Francis Eustache
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Karine Lebreton
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This article has a correction. Please see:

  • Erratum for Yan et al., The Biological Responses of Axotomized Adult Motoneurons to Brain-Derived Neurotrophic Factor - October 15, 2008

Abstract

Previous neuroimaging studies in the visual domain have shown that neurons along the perceptual processing pathway retain the physical properties of written words, faces, and objects. The aim of this study was to reveal the existence of similar neuronal properties within the human auditory cortex. Brain activity was measured using functional magnetic resonance imaging during a repetition priming paradigm, with words and pseudowords heard in an acoustically degraded format. Both the amplitude and peak latency of the hemodynamic response (HR) were assessed to determine the nature of the neuronal signature of spoken word priming. A statistically significant stimulus type by repetition interaction was found in various bilateral auditory cortical areas, demonstrating either HR suppression and enhancement for repeated spoken words and pseudowords, respectively, or word-specific repetition suppression without any significant effects for pseudowords. Repetition latency shift only occurred with word-specific repetition suppression in the right middle/posterior superior temporal sulcus. In this region, both repetition suppression and latency shift were related to behavioral priming. Our findings highlight for the first time the existence of long-term spoken word memory traces within the human auditory cortex. The timescale of auditory information integration and the neuronal mechanisms underlying priming both appear to differ according to the level of representations coded by neurons. Repetition may “sharpen” word-nonspecific representations coding short temporal variations, whereas a complex interaction between the activation strength and temporal integration of neuronal activity may occur in neuronal populations coding word-specific representations within longer temporal windows.

  • repetition priming
  • spoken word
  • auditory cortex
  • fMRI
  • repetition suppression
  • repetition enhancement
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The Journal of Neuroscience: 28 (20)
Journal of Neuroscience
Vol. 28, Issue 20
14 May 2008
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Spoken Word Memory Traces within the Human Auditory Cortex Revealed by Repetition Priming and Functional Magnetic Resonance Imaging
Pierre Gagnepain, Gael Chételat, Brigitte Landeau, Jacques Dayan, Francis Eustache, Karine Lebreton
Journal of Neuroscience 14 May 2008, 28 (20) 5281-5289; DOI: 10.1523/JNEUROSCI.0565-08.2008

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Spoken Word Memory Traces within the Human Auditory Cortex Revealed by Repetition Priming and Functional Magnetic Resonance Imaging
Pierre Gagnepain, Gael Chételat, Brigitte Landeau, Jacques Dayan, Francis Eustache, Karine Lebreton
Journal of Neuroscience 14 May 2008, 28 (20) 5281-5289; DOI: 10.1523/JNEUROSCI.0565-08.2008
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