Neural Correlates of Vocal Production and Motor Control in Human Heschl's Gyrus

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
R BehroozmandJ D W Greenlee

Abstract

The present study investigated how pitch frequency, a perceptually relevant aspect of periodicity in natural human vocalizations, is encoded in Heschl's gyrus (HG), and how this information may be used to influence vocal pitch motor control. We recorded local field potentials from multicontact depth electrodes implanted in HG of 14 neurosurgical epilepsy patients as they vocalized vowel sounds and received brief (200 ms) pitch perturbations at 100 Cents in their auditory feedback. Event-related band power responses to vocalizations showed sustained frequency following responses that tracked voice fundamental frequency (F0) and were significantly enhanced in posteromedial HG during speaking compared with when subjects listened to the playback of their own voice. In addition to frequency following responses, a transient response component within the high gamma frequency band (75-150 Hz) was identified. When this response followed the onset of vocalization, the magnitude of the response was the same for the speaking and playback conditions. In contrast, when this response followed a pitch shift, its magnitude was significantly enhanced during speaking compared with playback. We also observed that, in anterolateral HG, the power of...Continue Reading

Citations

May 21, 2016·Frontiers in Human Neuroscience·Kirill V NourskiAriane E Rhone
Aug 9, 2016·Scientific Reports·Eleonora BartoliAlessandro D'Ausilio
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Oct 13, 2017·NeuroImage·Roozbeh BehroozmandJulius Fridriksson
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