期刊
PSYCHOPHYSIOLOGY
卷 50, 期 6, 页码 563-569出版社
WILEY
DOI: 10.1111/psyp.12041
关键词
Sensation; perception; Normal volunteers; EEG; ERP
资金
- European Community [PERG04-GA-2008-239393]
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences
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 2kHz, no attenuation should occur at frequencies above 2kHz. A self-induced tone paradigm was administered with 0.5, 2.0, and 8.0kHz 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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