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Coding of Melodic Gestalt in Human Auditory Cortex

Schindler, Andreas ; Herdener, Marcus ; Bartels, Andreas

In: Cerebral Cortex, 2013, vol. 23, no. 12, p. 2987-2993

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    Titre
    • Coding of Melodic Gestalt in Human Auditory Cortex
    Auteur
    • Schindler, Andreas. Vision and Cognition Lab, Centre for Integrative Neuroscience, University of Tübingen, Tübingen, Germany
    • Herdener, Marcus. Psychiatric University Hospital, University of Zürich, Zürich 8032, Switzerland and
    • Bartels, Andreas. Vision and Cognition Lab, Centre for Integrative Neuroscience, University of Tübingen, Tübingen, Germany
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • Cerebral Cortex, 2013, vol. 23, no. 12, p. 2987-2993. Oxford University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:302682
    Summary
    The perception of a melody is invariant to the absolute properties of its constituting notes, but depends on the relation between them—the melody's relative pitch profile. In fact, a melody's "Gestalt” is recognized regardless of the instrument or key used to play it. Pitch processing in general is assumed to occur at the level of the auditory cortex. However, it is unknown whether early auditory regions are able to encode pitch sequences integrated over time (i.e., melodies) and whether the resulting representations are invariant to specific keys. Here, we presented participants different melodies composed of the same 4 harmonic pitches during functional magnetic resonance imaging recordings. Additionally, we played the same melodies transposed in different keys and on different instruments. We found that melodies were invariantly represented by their blood oxygen level-dependent activation patterns in primary and secondary auditory cortices across instruments, and also across keys. Our findings extend common hierarchical models of auditory processing by showing that melodies are encoded independent of absolute pitch and based on their relative pitch profile as early as the primary auditory cortex