Brain Advance Access published online on September 7, 2006
Brain, doi:10.1093/brain/awl247
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1 Rotman Research Institute, Baycrest, University of Toronto, Toronto, Canada; Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Japan
* To whom correspondence should be addressed. Auditory evoked responses to a violin tone and a noise-burst stimulus were recorded from 4- to 6-year-old children in four repeated measurements over a 1-year period using magnetoencephalography (MEG). Half of the subjects participated in musical lessons throughout the year; the other half had no music lessons. Auditory evoked magnetic fields showed prominent bilateral P100m, N250m, P320m and N450m peaks. Significant change in the peak latencies of all components except P100m was observed over time. Larger P100m and N450m amplitude as well as more rapid change of N250m amplitude and latency was associated with the violin rather than the noise stimuli. Larger P100m and P320m peak amplitudes in the left hemisphere than in the right are consistent with left-lateralized cortical development in this age group. A clear musical training effect was expressed in a larger and earlier N250m peak in the left hemisphere in response to the violin sound in musically trained children compared with untrained children. This difference coincided with pronounced morphological change in a time window between 100 and 400 ms, which was observed in musically trained children in response to violin stimuli only, whereas in untrained children a similar change was present regardless of stimulus type. This transition could be related to establishing a neural network associated with sound categorization and/or involuntary attention, which can be altered by music learning experience.
Received July 3, 2006
Revised August 10, 2006
Accepted August 11, 2006
Article
One year of musical training affects development of auditory cortical-evoked fields in young children
Takako Fujioka 1 *, Bernhard Ross 2, Ryusuke Kakigi 3, Christo Pantev 4, and Laurel J. Trainor 5
2 Rotman Research Institute, Baycrest, University of Toronto, Toronto, Canada
3 Department of Integrative Physiology, National Institute for Physiological Sciences, Okazaki, Japan
4 Institute for Biomagnetism and Biosignal analysis, University of Münster, Münster, Germany
5 Rotman Research Institute, Baycrest, University of Toronto, Toronto, Canada; Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Canada
Takako Fujioka, E-mail: tfujioka{at}rotman-baycrest.on.ca
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