Meeting Banner
Abstract #0577

Encoding of sound frequency and location in human subcortical structures

Michelle Moerel 1 , Federico De Martino 2 , Roberta Santoro 2 , Kamil Ugurbil 1 , Essa Yacoub 1 , and Elia Formisano 2

1 Department of Radiology, Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, Minnesota, United States, 2 Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, Netherlands

We combined computational modeling with ultra-high field fMRI (7T) to explore responses to natural sounds in two subcortical auditory structures: the inferior colliculus (IC) and the medial geniculate body (MGB). Out of four computational models tested, only a model with a dependent frequency by location tuning could significantly predict responses to novel testing sounds. This suggests that at the level of IC and MGB, neuronal populations jointly encode sound frequency and sound location. Color-coding voxels according to their best frequency and location revealed fine-grained tonotopic maps and tuning to contralateral sound locations.

This abstract and the presentation materials are available to members only; a login is required.

Join Here