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Human auditory cortex is sensitive to the perceived clarity of speech
Queen's University, Kingston ON Canada.
Medical Research Council Cognition and Brain Sciences Unit, Cambridge, UK.
Linköping University, Department of Behavioural Sciences and Learning, Disability Research. Linköping University, Faculty of Arts and Sciences. (HEAD)ORCID iD: 0000-0002-7810-1333
2012 (English)In: NeuroImage, ISSN 1053-8119, E-ISSN 1095-9572, Vol. 60, no 2, 1490-1502 p.Article in journal (Refereed) Published
Abstract [en]

Feedback connections among auditory cortical regions may play an important functional role in processing naturalistic speech, which is typically considered a problem solved through serial feed-forward processing stages. Here, we used fMRI to investigate whether activity within primary auditory cortex (PAC) is sensitive to the perceived clarity of degraded sentences. A region-of-interest analysis using probabilistic cytoarchitectonic maps of PAC revealed a modulation of activity, in the most primary-like subregion (area Te1.0). related to the intelligibility of naturalistic speech stimuli that cannot be driven by stimulus differences. Importantly, this effect was unique to those conditions accompanied by a perceptual increase in clarity. Connectivity analyses suggested sources of input to PAC are higher-order temporal, frontal and motor regions. These findings are incompatible with feed-forward models of speech perception, and suggest that this problem belongs amongst modern perceptual frameworks in which the brain actively predicts sensory input, rather than just passively receiving it.

Place, publisher, year, edition, pages
Elsevier , 2012. Vol. 60, no 2, 1490-1502 p.
Keyword [en]
fMRI, Primary auditory cortex, Speech perception, Predictive coding, Top-down influences, Superior temporal sulcus, Premotor cortex, Inferior frontal gyrus, Feedback connections
National Category
Social Sciences
URN: urn:nbn:se:liu:diva-77537DOI: 10.1016/j.neuroimage.2012.01.035ISI: 000303272300060OAI: diva2:528597
Available from: 2012-05-28 Created: 2012-05-22 Last updated: 2015-04-16

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Johnsrude, Ingrid
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