No evidence for peripheral mechanism attenuating auditory ERPs to self-induced tones

Authors

  • János Horváth,

    Corresponding author
    • Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
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  • Annamária Burgyán

    1. Institute of Cognitive Neuroscience and Psychology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
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  • This research was supported by the European Community's Seventh Framework Programme (under grant agreement PERG04-GA-2008-239393), and the János Bolyai Research Scholarship of the Hungarian Academy of Sciences.

Address correspondence to: János Horváth, Institute of Cognitive Neuroscience and Psychology, RCNS, Hungarian Academy of Sciences, P.O.B. 398, Szondi u 83/85, H-1394 Budapest, Hungary. E-mail: horvath.janos@ttk.mta.hu

Abstract

The N1 and P2 event-related potentials (ERPs) are attenuated when the eliciting sounds coincide with our own actions. Although this ERP attenuation could be caused by central processes, it may also reflect a peripheral mechanism: the coactivation of the stapedius muscle with the task-relevant effector, which reduces signal transmission efficiency in the middle ear, reducing the effective intensity of concurrently presented tones, which, in turn, elicit lower amplitude auditory ERPs. Because stapedius muscle contraction attenuates frequencies below 2 kHz, no attenuation should occur at frequencies above 2 kHz. A self-induced tone paradigm was administered with 0.5, 2.0, and 8.0 kHz pure tones. Self-induced tones elicited attenuated N1 and P2 ERPs, but the magnitude of attenuation was not affected by tone frequency. This result does not support the hypothesis that ERP attenuation to self-induced tones are caused by stapedius muscle contractions.

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