The human voice areas: Spatial organization and inter-individual variability in temporal and extra-temporal cortices

Cyril R. Pernet, Phil McAleer, Marianne Latinus, Krzysztof J. Gorgolewski, Ian Charest, Patricia E.G. Bestelmeyer, Rebecca H. Watson, David Fleming, Frances Crabbe, Mitchell Valdes-Sosa, Pascal Belin
2015 NeuroImage  
Voice Functional magnetic resonance imaging Superior temporal sulcus Superior temporal gyrus Amygdala Inferior prefrontal cortex fMRI studies increasingly examine functions and properties of non-primary areas of human auditory cortex. However there is currently no standardized localization procedure to reliably identify specific areas across individuals such as the standard 'localizers' available in the visual domain. Here we present an fMRI 'voice localizer' scan allowing rapid and reliable
more » ... alization of the voice-sensitive 'temporal voice areas' (TVA) of human auditory cortex. We describe results obtained using this standardized localizer scan in a large cohort of normal adult subjects. Most participants (94%) showed bilateral patches of significantly greater response to vocal than nonvocal sounds along the superior temporal sulcus/gyrus (STS/STG). Individual activation patterns, although reproducible, showed high inter-individual variability in precise anatomical location. Cluster analysis of individual peaks from the large cohort highlighted three bilateral clusters of voice-sensitivity, or "voice patches" along posterior (TVAp), mid (TVAm) and anterior (TVAa) STS/STG, respectively. A series of extra-temporal areas including bilateral inferior prefrontal cortex and amygdalae showed small, but reliable voice-sensitivity as part of a large-scale cerebral voice network. Stimuli for the voice localizer scan and probabilistic maps in MNI space are available for download. Crown
doi:10.1016/j.neuroimage.2015.06.050 pmid:26116964 pmcid:PMC4768083 fatcat:vmxj5ssvqnbjjgqiyezzde5ycy