Assessment of tonotopically organised subdivisions in human auditory cortex using volumetric and surface-based cortical alignments.

ABSTRACT: Although orderly representations of sound frequency in the brain play a guiding role in the investigation of auditory processing, a rigorous statistical evaluation of cortical tonotopic maps has so far hardly been attempted. In this report, the group-level significance of local tonotopic gradients was assessed using mass-multivariate statistics. The existence of multiple fields on the superior surface of the temporal lobe in both hemispheres was shown. These fields were distinguishable on the basis of tonotopic gradient direction and may likely be identified with the human homologues of the core areas AI and R in primates. Moreover, an objective comparison was made between the usage of volumetric and surface-based registration methods. Although the surface-based method resulted in a better

SUBMITTER: Langers DR 

PROVIDER: S-EPMC6868999 | biostudies-literature | 2014 Apr

REPOSITORIES: biostudies-literature