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  Spectrotemporal modulation provides a unifying framework for auditory cortical asymmetries

Flinker, A., Doyle, W. K., Mehta, A. D., Devinsky, O., & Poeppel, D. (2019). Spectrotemporal modulation provides a unifying framework for auditory cortical asymmetries. Nature Human Behaviour, 3(4), 393-405. doi:10.1038/s41562-019-0548-z.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-7A3E-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-7A3F-F
Genre: Journal Article

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 Creators:
Flinker, Adeen1, 2, Author
Doyle, Werner K.3, Author
Mehta, Ashesh D.4, Author
Devinsky, Orrin2, Author
Poeppel, David5, 6, Author              
Affiliations:
1Department of Psychology, New York University , New York, NY, USA, ou_persistent22              
2Department of Neurology, New York University School of Medicine , New York, NY, USA, ou_persistent22              
3Department of Neurosurgery, New York University School of Medicine , New York, NY, USA, ou_persistent22              
4Department of Neurosurgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Manhasset, NY, USA, ou_persistent22              
5Department of Neuroscience, Max Planck Institute for Empirical Aesthetics, Max Planck Society, ou_2421697              
6Department of Psychology, New York University, New York, NY, USA, ou_persistent22              

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 Abstract: The principles underlying functional asymmetries in cortex remain debated. For example, it is accepted that speech is processed bilaterally in auditory cortex, but a left hemisphere dominance emerges when the input is interpreted linguistically. The mechanisms, however, are contested, such as what sound features or processing principles underlie laterality. Recent findings across species (humans, canines and bats) provide converging evidence that spectrotemporal sound features drive asymmetrical responses. Typically, accounts invoke models wherein the hemispheres differ in time-frequency resolution or integration window size. We develop a framework that builds on and unifies prevailing models, using spectrotemporal modulation space. Using signal processing techniques motivated by neural responses, we test this approach, employing behavioural and neurophysiological measures. We show how psychophysical judgements align with spectrotemporal modulations and then characterize the neural sensitivities to temporal and spectral modulations. We demonstrate differential contributions from both hemispheres, with a left lateralization for temporal modulations and a weaker right lateralization for spectral modulations. We argue that representations in the modulation domain provide a more mechanistic basis to account for lateralization in auditory cortex.

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Language(s): eng - English
 Dates: 2018-05-032019-01-182019-03-042019-04
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: ISI: 000464024000019
DOI: 10.1038/s41562-019-0548-z
 Degree: -

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Title: Nature Human Behaviour
Source Genre: Journal
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Publ. Info: London : Nature Research
Pages: - Volume / Issue: 3 (4) Sequence Number: - Start / End Page: 393 - 405 Identifier: ISSN: 2397-3374
CoNE: https://pure.mpg.de/cone/journals/resource/2397-3374