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Effect of stimulus onset delay on auditory cortex neural responses to voice pitch feedback perturbation
Ist Teil von
The Journal of the Acoustical Society of America, 2009-04, Vol.125 (4_Supplement), p.2719-2719
Erscheinungsjahr
2009
Link zum Volltext
Quelle
AIP Journals Complete
Beschreibungen/Notizen
It has previously been shown that the auditory neural responses to voice F0 feedback perturbation are suppressed during active vocalization compared to passive listening to the playback. However, a study in primates showed that the vocalization-induced suppression enhances auditory sensitivity to feedback perturbation. This evidence suggests that the cortical neural responses to self-vocalization reflect suppression to vocal onset and excitation in response to perturbations in voice pitch feedback. In this study, we investigated the effect of stimulus onset delay on cortical neural responses to voice F0 feedback perturbation. Event-related potentials (ERPs) were recorded in human subjects in response to simultaneous (0 ms) and delayed (500 ms) PSS (+200 cents) during active vocalization and passive listening conditions. Results showed that, for the delayed PSS, the P200 peak magnitude was larger during vocalization compared with passive listening. This finding suggests that vocalization enhances auditory cortex responsiveness to deviations in voice pitch feedback following the onset of vocalization. This enhancement might be due to changes in tuning properties of auditory neurons by the vocal motor system that helps to detect and correct for vocal errors during speech production.