fMRI study of sound pressure level encoding in the different subdivisions of inferior colliculus

Electronic Poster Session: Functional MRI (neuro) - fMRI Applications In NeuroscienceIn all mammals, the inferior colliculus (IC) is the major midbrain nucleus for integration of auditory information from the brainstem. It is composed of a central nucleus (CIC) adjacent to the external cortical nucleus (ECIC). One important piece of physical auditory information is intensity, which is customarily reported as sound pressure level (SPL). In our study, the BOLD signal changes increase with SPL in both the ECIC and CIC, but the slope in the ECIC is significantly higher than that in the CIC possibly due to a greater fraction of monotonic neurons in the ECIC. (Abstract by ISMRM)link_to_OA_fulltex