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Abstract #3905

Auditory Cortex Modulates the Midbrain Response Selectivity to Behaviorally Relevant Sounds

Jevin W. Zhang 1,2 , Patrick P. Gao 1,2 , Shu-Juan Fan 1,2 , Dan H. Sanes 3 , and Ed X. Wu 1,2

1 Laboratory of Biomedical Imaging and Signal Processing, The University of Hong Kong, Hong Kong, Hong Kong SAR, China, 2 Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, Hong Kong SAR, China, 3 Center for Neural Science, New York University, New York, NY, United States

The auditory cortex (AC) is the source of one of the largest inputs to the inferior colliculus (IC). Normal IC exhibits stronger BOLD response to forward vocalizations than to the temporally inverted one. But this responses selectivity to behaviorally relevant sound requires AC inputs. After bilateral AC ablation, the BOLD response difference between the two vocalizations in the IC was diminished. In the unilateral (right side) AC ablation animals, the BOLD response difference between the two vocalizations in the ablation (right) side was negligible while the contralateral (left) ECIC still showed a stronger response to the forward vocalization.

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