From noise to pitch: Transient and sustained responses of the auditory evoked field

In recent magnetoencephalographic studies, we established a novel component of the auditory evoked field, which is elicited by a transition from noise to pitch in the absence of a change in energy. It is referred to as the ‘pitch onset response’. To extend our understanding of pitch-related neural a...

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Bibliographic Details
Published in:Hearing research 2006-08, Vol.218 (1), p.50-63
Main Authors: Seither-Preisler, A., Patterson, Roy D., Krumbholz, K., Seither, S., Lütkenhöner, B.
Format: Article
Language:English
Subjects:
Acoustic Stimulation
Auditory cortex
Biological and medical sciences
Ear and associated structures. Auditory pathways and centers. Hearing. Vocal organ. Phonation. Sound production. Echolocation
Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology
Evoked Potentials, Auditory - physiology
Female
Fundamental and applied biological sciences. Psychology
Humans
Magnetoencephalography
Male
Medical sciences
MEG
Models, Biological
Noise
Non tumoral diseases
Otorhinolaryngology. Stomatology
Pitch
Pitch onset response
RIS
Spectral bandwidth
Sustained field
Temporal coding
Vertebrates: nervous system and sense organs
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Summary:In recent magnetoencephalographic studies, we established a novel component of the auditory evoked field, which is elicited by a transition from noise to pitch in the absence of a change in energy. It is referred to as the ‘pitch onset response’. To extend our understanding of pitch-related neural activity, we compared transient and sustained auditory evoked fields in response to a 2000-ms segment of noise and a subsequent 1000-ms segment of regular interval sound (RIS). RIS provokes the same long-term spectral representation in the auditory system as noise, but is distinguished by a definite pitch, the salience of which depends on the degree of temporal regularity. The stimuli were presented at three steps of increasing regularity and two spectral bandwidths. The auditory evoked fields were recorded from both cerebral hemispheres of twelve subjects with a 37-channel magnetoencephalographic system. Both the transient and the sustained components evoked by noise and RIS were sensitive to spectral bandwidth. Moreover, the pitch salience of the RIS systematically affected the pitch onset response, the sustained field, and the off-response. This indicates that the underlying neural generators reflect the emergence, persistence and offset of perceptual attributes derived from the temporal regularity of a sound.
ISSN:0378-5955
1878-5891
DOI:10.1016/j.heares.2006.04.005