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Lookup NU author(s): Dr Sukhbinder Kumar,
Dr Will Sedley,
Professor Tim Griffiths
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In this work, we show that electrophysiological responses during pitch perception are best explained by distributed activity in a hierarchy of cortical sources and, crucially, that the effective connectivity between these sources is modulated with pitch strength. Local field potentials were recorded in two subjects from primary auditory cortex and adjacent auditory cortical areas along the axis of Heschl's gyrus (HG) while they listened to stimuli of varying pitch strength. Dynamic causal modeling was used to compare system architectures that might explain the recorded activity. The data show that representation of pitch requires an interaction between nonprimary and primary auditory cortex along HG that is consistent with the principle of predictive coding.
Author(s): Kumar S, Sedley W, Nourski KV, Kawasaki H, Oya H, Patterson RD, Howard MA, Friston KJ, Griffiths TD
Publication type: Article
Publication status: Published
Journal: Journal of Cognitive Neuroscience
Print publication date: 18/08/2011
ISSN (print): 0898-929X
ISSN (electronic): 1530-8898
Publisher: MIT Press
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