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Published on: August 12, 2019
Activation in the Right Inferior Parietal Lobule Reflects the Representation of Musical Structure beyond Simple Pitch
Isabelle Royal1,2,3, Dominique T Vuvan1,2,3, Benjamin Rich Zendel2,4
1Département de psychologie, Université de Montréal, Québec, Canada.
Abstract:
Pitch discrimination tasks typically engage the superior temporal gyrus and the right inferior frontal gyrus. It is currently unclear whether these regions are equally involved in the processing of incongruous notes in melodies, which requires the representation of musical structure (tonality) in addition to pitch discrimination. To this aim, 14 participants completed two tasks while undergoing functional magnetic resonance imaging, one in which they had to identify a pitch change in a series of non-melodic repeating tones and a second in which they had to identify an incongruous note in a tonal melody. In both tasks, the deviants activated the right superior temporal gyrus. A contrast between deviants in the melodic task and deviants in the non-melodic task (melodic > non-melodic) revealed additional activity in the right inferior parietal lobule. Activation in the inferior parietal lobule likely represents processes related to the maintenance of tonal pitch structure in working memory during pitch discrimination.
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