Cortical contributions to the auditory frequency-following response revealed by MEG

Emily B. J. Coffey (), Sibylle C. Herholz, Alexander M. P. Chepesiuk, Sylvain Baillet and Robert J. Zatorre
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Emily B. J. Coffey: Montreal Neurological Institute, McGill University
Sibylle C. Herholz: Montreal Neurological Institute, McGill University
Alexander M. P. Chepesiuk: Montreal Neurological Institute, McGill University
Sylvain Baillet: Montreal Neurological Institute, McGill University
Robert J. Zatorre: Montreal Neurological Institute, McGill University

Nature Communications, 2016, vol. 7, issue 1, 1-11

Abstract: Abstract The auditory frequency-following response (FFR) to complex periodic sounds is used to study the subcortical auditory system, and has been proposed as a biomarker for disorders that feature abnormal sound processing. Despite its value in fundamental and clinical research, the neural origins of the FFR are unclear. Using magnetoencephalography, we observe a strong, right-asymmetric contribution to the FFR from the human auditory cortex at the fundamental frequency of the stimulus, in addition to signal from cochlear nucleus, inferior colliculus and medial geniculate. This finding is highly relevant for our understanding of plasticity and pathology in the auditory system, as well as higher-level cognition such as speech and music processing. It suggests that previous interpretations of the FFR may need re-examination using methods that allow for source separation.

Date: 2016
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DOI: 10.1038/ncomms11070

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