Illusory vowels resulting from perceptual continuity: a functional magnetic resonance imaging study.

Journal of Cognitive Neuroscience
Antje HeinrichIngrid S Johnsrude

Abstract

We used functional magnetic resonance imaging to study the neural processing of vowels whose perception depends on the continuity illusion. Participants heard sequences of two-formant vowels under a number of listening conditions. In the "vowel conditions," both formants were always present simultaneously and the stimuli were perceived as speech-like. Contrasted with a range of nonspeech sounds, these vowels elicited activity in the posterior middle temporal gyrus (MTG) and superior temporal sulcus (STS). When the two formants alternated in time, the "speech-likeness" of the sounds was reduced. It could be partially restored by filling the silent gaps in each formant with bands of noise (the "Illusion" condition) because the noise induced an illusion of continuity in each formant region, causing the two formants to be perceived as simultaneous. However, this manipulation was only effective at low formant-to-noise ratios (FNRs). When the FNR was increased, the illusion broke down (the "illusion-break" condition). Activation in vowel-sensitive regions of the MTG was greater in the illusion than in the illusion-break condition, consistent with the perception of Illusion stimuli as vowels. Activity in Heschl's gyri (HG), the approx...Continue Reading

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Citations

Nov 26, 2009·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Matthew H Davis, M Gareth Gaskell
Jan 28, 2011·Journal of Cognitive Neuroscience·Antje HeinrichIngrid S Johnsrude
Jul 24, 2010·The Journal of the Acoustical Society of America·Ekaterina VinnikEvan Balaban
Nov 18, 2011·The Journal of the Acoustical Society of America·Nicholas R Haywood, Brian Roberts
Dec 24, 2015·Journal of Cognitive Neuroscience·Samuel EvansSophie K Scott
Feb 1, 2011·Hearing Research·Lars RieckeElia Formisano
Apr 24, 2010·Brain and Language·Peter E Turkeltaub, H Branch Coslett
Dec 20, 2011·NeuroImage·Antoine J ShahinLee M Miller
Dec 26, 2013·Hearing Research·Pranesh BhargavaDeniz Başkent
Apr 18, 2016·NeuroImage·Claudia Beck LidénThomas Ethofer
Jun 15, 2010·Hearing Research·Christopher I Petkov, Mitchell L Sutter
Nov 4, 2008·NeuroImage·Antoine J ShahinLee M Miller
Dec 21, 2016·Nature Communications·Matthew K LeonardEdward F Chang
Dec 17, 2014·Journal of Neurophysiology·Jyoti BhatAntoine J Shahin
Jul 10, 2012·Journal of Neurophysiology·Ekaterina VinnikEvan Balaban
Feb 13, 2018·The European Journal of Neuroscience·Mathis KaiserJulian Keil
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