Attenuation of auditory evoked potentials for hand and eye-initiated sounds

Mifsud, N.G. and Beesley, T. and Watson, T.L. and Whitford, T.J. (2016) Attenuation of auditory evoked potentials for hand and eye-initiated sounds. Biological Psychology, 120. pp. 61-68. ISSN 0301-0511

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Reduction of auditory event-related potentials (ERPs) to self-initiated sounds has been considered evidence for a predictive model in which copies of motor commands suppress sensory representations of incoming stimuli. However, in studies which involve arbitrary auditory stimuli evoked by sensory-unspecific motor actions, learned associations may underlie ERP differences. Here, in a new paradigm, eye motor output generated auditory sensory input, a naïve action–sensation contingency. We measured the electroencephalogram (EEG) of 40 participants exposed to pure tones, which they produced with either a button-press or volitional saccade. We found that button-press-initiated stimuli evoked reduced amplitude compared to externally initiated stimuli for both the N1 and P2 ERP components, whereas saccade-initiated stimuli evoked intermediate attenuation at N1 and no reduction at P2. These results indicate that the motor-to-sensory mapping involved in speech production may be partly generalized to other contingencies, and that learned associations also contribute to the N1 attenuation effect.

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Journal Article
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Biological Psychology
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cited By 4
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06 Oct 2017 19:38
Last Modified:
22 Nov 2022 05:03