Dual temporal encoding mechanisms in human auditory cortex: Evidence from MEG and EEG

NeuroImage
Huizhen TangBlake W Johnson

Abstract

Current hypotheses about language processing advocate an integral relationship between encoding of temporal information and linguistic processing in the brain. All such explanations must accommodate the evident ability of the perceptual system to process both slow and fast time scales in speech. However most cortical neurons are limited in their capability to precisely synchronise to temporal modulations at rates faster than about 50Hz. Hence, a central question in auditory neurophysiology concerns how the full range of perceptually relevant modulation rates might be encoded in the cerebral cortex. Here we show with concurrent noninvasive magnetoencephalography (MEG) and electroencephalography (EEG) measurements that the human auditory cortex transitions between a phase-locked (PL) mode of responding to modulation rates below about 50Hz, and a non-phase-locked (NPL) mode at higher rates. Precisely such dual response modes are predictable from the behaviours of single neurons in auditory cortices of non-human primates. Our data point to a common mechanistic explanation for the single neuron and MEG/EEG results and support the hypothesis that two distinct types of neuronal encoding mechanisms are employed by the auditory cortex t...Continue Reading

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Citations

Nov 12, 2016·Brain and Language·Astrid De VosJan Wouters
Mar 31, 2017·Ear and Hearing·Robin GransierJan Wouters
Feb 23, 2020·The European Journal of Neuroscience·Seung-Goo KimTobias Overath
Nov 2, 2020·Developmental Cognitive Neuroscience·Astrid De VosJan Wouters
Apr 17, 2020·Neuroscience and Biobehavioral Reviews·Boris GourévitchJos J Eggermont
Nov 4, 2021·The European Journal of Neuroscience·Raúl Granados BarberoJan Wouters

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