Neuromagnetic Evidence for a Pitch Processing Center in Heschl’s Gyrus

There have been several attempts to use the neuromagnetic response to the onset of a tonal sound (N100m) to study pitch processing in auditory cortex. Unfortunately, a large proportion of the N100m is simply a response to the onset of sound energy, independent of whether the sound produces a pitch....

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Bibliographic Details
Published in:Cerebral cortex (New York, N.Y. 1991) N.Y. 1991), 2003-07, Vol.13 (7), p.765-772
Main Authors: Krumbholz, K., Patterson, R.D., Seither-Preisler, A., Lammertmann, C., Lütkenhöner, B.
Format: Article
Language:English
Subjects:
Acoustic Stimulation - methods
Auditory Cortex - physiology
Brain Mapping - methods
Evoked Potentials, Auditory - physiology
Heschl's gyrus
Humans
Magnetoencephalography - methods
Noise
Pitch Discrimination - physiology
Pitch Perception - physiology
Reaction Time - physiology
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Summary:There have been several attempts to use the neuromagnetic response to the onset of a tonal sound (N100m) to study pitch processing in auditory cortex. Unfortunately, a large proportion of the N100m is simply a response to the onset of sound energy, independent of whether the sound produces a pitch. The current study describes a novel stimulus paradigm designed to circumvent the energy-onset response and thereby isolate the response of those neural elements specifically involved in pitch processing. The temporal resolution of magnetoencephalography enables us to show that the latency and amplitude of this pitch-onset response (POR) vary with the pitch and pitch strength of the tone. The spatial resolution is sufficient to show that its source lies somewhat anterior and inferior to that of the N100m, probably in the medial part of Heschl’s gyrus.
ISSN:1047-3211
1460-2199
1460-2199
DOI:10.1093/cercor/13.7.765