Enhanced early-latency electromagnetic activity in the left premotor cortex is associated with successful phonetic categorization

NeuroImage
Jussi AlhoIiro P Jääskeläinen

Abstract

Sensory-motor interactions between auditory and articulatory representations in the dorsal auditory processing stream are suggested to contribute to speech perception, especially when bottom-up information alone is insufficient for purely auditory perceptual mechanisms to succeed. Here, we hypothesized that the dorsal stream responds more vigorously to auditory syllables when one is engaged in a phonetic identification/repetition task subsequent to perception compared to passive listening, and that this effect is further augmented when the syllables are embedded in noise. To this end, we recorded magnetoencephalography while twenty subjects listened to speech syllables, with and without noise masking, in four conditions: passive perception; overt repetition; covert repetition; and overt imitation. Compared to passive listening, left-hemispheric N100m equivalent current dipole responses were amplified and shifted posteriorly when perception was followed by covert repetition task. Cortically constrained minimum-norm estimates showed amplified left supramarginal and angylar gyri responses in the covert repetition condition at ~100ms from stimulus onset. Longer-latency responses at ~200ms were amplified in the covert repetition con...Continue Reading

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Citations

Apr 18, 2013·Experimental Brain Research·Marc SatoVincent Gracco
Mar 8, 2014·Neuroscience Bulletin·Zhe-Meng WuLiang Li
Oct 18, 2014·The Journal of the Acoustical Society of America·Ali Hadian CefidekhanieJean-Luc Schwartz
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May 21, 2016·Frontiers in Neuroscience·Natsue YoshimuraYasuharu Koike
Nov 24, 2016·Frontiers in Human Neuroscience·Dariya GoranskayaGesa Hartwigsen
Jan 31, 2020·Frontiers in Human Neuroscience·David JensonTim Saltuklaroglu
Dec 23, 2017·Brain and Language·Einat Liebenthal, Riikka Möttönen
Nov 27, 2019·Neuropsychologia·Krystyna Grabski, Marc Sato
Oct 7, 2019·Brain and Language·Marieke LongcampMarc Sato

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