title: Enhanced auditory evoked activity to self-generated sounds is mediated by primary and supplementary motor cortices.
abstract: Accumulating evidence demonstrates that responses in auditory cortex to auditory consequences of self-generated actions are modified relative to the responses evoked by identical sounds generated by an external source. Such modifications have been suggested to occur through a corollary discharge sent from the motor system, although the exact neuroanatomical origin is unknown. Furthermore, since tactile input has also been shown to modify responses in auditory cortex, it is not even clear whether the source of such modifications is motor output or somatosensory feedback. We recorded functional magnetic resonance imaging (fMRI) data from healthy human subjects (n = 11) while manipulating the rate at which they performed sound-producing actions with their right hand. In addition, we manipulated the amount of tactile feedback to examine the relative roles of motor and somatosensory cortices in modifying evoked activity in auditory cortex (superior temporal gyrus). We found an enhanced fMRI signal in left auditory cortex during perception of self-generated sounds relative to passive listening to identical sounds. Moreover, the signal difference between active and passive conditions in left auditory cortex covaried with the rate of sound-producing actions and was invariant to the amount of tactile feedback. Together with functional connectivity analysis, our results suggest motor output from supplementary motor area and left primary motor cortex as the source of signal modification in auditory cortex during perception of self-generated sounds. Motor signals from these regions could represent a predictive signal of the expected auditory consequences of the performed action.
authors: School of Psychological Sciences and Sagol School of Neuroscience Tel-Aviv University, Tel-Aviv 69978, Israel.
authors: Daniel
authors: D
authors: Reznik
authors: School of Psychological Sciences and Sagol School of Neuroscience Tel-Aviv University, Tel-Aviv 69978, Israel.
authors: Ori
authors: O
authors: Ossmy
authors: School of Psychological Sciences and Sagol School of Neuroscience Tel-Aviv University, Tel-Aviv 69978, Israel rmukamel@tau.ac.il.
authors: Roy
authors: http://orcid.org/0000-0001-9359-8950
authors: R
authors: Mukamel
mesh_terms: D000328:Adult; D001303:Auditory Cortex / Q000502:physiology*; D001307:Auditory Perception; D005072:Evoked Potentials, Auditory; D056228:Feedback, Sensory; D005260:Female; D006225:Hand / Q000294:innervation / Q000502:physiology; D006801:Humans; D008297:Male; D009044:Motor Cortex / Q000502:physiology*; D011597:Psychomotor Performance; D013016:Sound; D014110:Touch
keywords: action consequences; auditory perception; corollary discharge; efference copy; fMRI
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