A temporal predictive code for voice motor control: Evidence from ERP and behavioral responses to pitch-shifted auditory feedback

Brain Research
Roozbeh BehroozmandCharles R Larson

Abstract

The predictive coding model suggests that voice motor control is regulated by a process in which the mismatch (error) between feedforward predictions and sensory feedback is detected and used to correct vocal motor behavior. In this study, we investigated how predictions about timing of pitch perturbations in voice auditory feedback would modulate ERP and behavioral responses during vocal production. We designed six counterbalanced blocks in which a +100 cents pitch-shift stimulus perturbed voice auditory feedback during vowel sound vocalizations. In three blocks, there was a fixed delay (500, 750 or 1000 ms) between voice and pitch-shift stimulus onset (predictable), whereas in the other three blocks, stimulus onset delay was randomized between 500, 750 and 1000 ms (unpredictable). We found that subjects produced compensatory (opposing) vocal responses that started at 80 ms after the onset of the unpredictable stimuli. However, for predictable stimuli, subjects initiated vocal responses at 20 ms before and followed the direction of pitch shifts in voice feedback. Analysis of ERPs showed that the amplitudes of the N1 and P2 components were significantly reduced in response to predictable compared with unpredictable stimuli. The...Continue Reading

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Citations

Feb 3, 2018·Aging Clinical and Experimental Research·Karim JohariRoozbeh Behroozmand
Dec 5, 2017·ELife·Thomas J WhitfordMike E Le Pelley
Oct 30, 2018·Journal of Motor Behavior·Roozbeh Behroozmand, Karim Johari
Nov 12, 2019·Frontiers in Neuroscience·Franziska KnolleSonja A Kotz
Aug 24, 2021·Journal of Cognitive Neuroscience·Bradley N JackOren Griffiths

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