Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7317733 | Neuropsychologia | 2018 | 12 Pages |
Abstract
Crossmodal correspondences refer to associations between otherwise unrelated stimulus features in different sensory modalities. For example, high and low auditory pitches are associated with high and low visuospatial elevation, respectively. The neural mechanisms underlying crossmodal correspondences are currently unknown. Here, we used functional magnetic resonance imaging (fMRI) to investigate the neural basis of the pitch-elevation correspondence. Pitch-elevation congruency effects were observed bilaterally in the inferior frontal and insular cortex, the right frontal eye field and right inferior parietal cortex. Independent functional localizers failed to provide strong evidence for any of three proposed mechanisms for crossmodal correspondences: semantic mediation, magnitude estimation, and multisensory integration. Instead, pitch-elevation congruency effects overlapped with areas selective for visually presented non-word strings relative to sentences, and with regions sensitive to audiovisual asynchrony. Taken together with the prior literature, the observed congruency effects are most consistent with mediation by multisensory attention.
Keywords
ITSprecentral sulcuspreSMAIOGpreCGSFGPOCSSMGPOFSOGSPGITGlingual gyrusmedialIOSINSMFGSFsMOGSTSfusiform gyrusSupramarginal gyrusiPSCongruency effectPrecuneusMagnitudeMEDAOSAttentioninsulaWorking memorymiddle occipital gyrusPostcentral gyruscollateral sulcusintraparietal sulcuscingulate sulcuscentral sulcusSuperior frontal sulcusPosteriorInferior temporal gyrusSuperior frontal gyrusInferior occipital gyrusanteriorSemanticPre-supplementary motor areaventralFrontal operculumMultisensorycalcarine sulcusprecentral gyrusangular gyruscingulate gyrusmiddle frontal gyrus
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Authors
Kelly McCormick, Simon Lacey, Randall Stilla, Lynne C. Nygaard, K. Sathian,