1. Attenuation of auditory evoked potentials for hand and eye-initiated sounds
- Author
-
Tom Beesley, Tamara L. Watson, Nathan G. Mifsud, and Thomas J. Whitford
- Subjects
Adult ,Male ,Auditory perception ,Speech production ,medicine.medical_specialty ,genetic structures ,Sensory system ,Electroencephalography ,Audiology ,Eye ,050105 experimental psychology ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Humans ,0501 psychology and cognitive sciences ,Communication ,medicine.diagnostic_test ,business.industry ,General Neuroscience ,Attenuation ,05 social sciences ,Motor commands ,Hand ,Neuropsychology and Physiological Psychology ,Acoustic Stimulation ,Saccade ,Auditory Perception ,Evoked Potentials, Auditory ,Auditory stimuli ,Female ,Psychology ,business ,030217 neurology & neurosurgery - Abstract
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.
- Published
- 2016