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J Neurophysiol 84: 3083-3087, 2000;
0022-3077/00 $5.00
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The Journal of Neurophysiology Vol. 84 No. 6 December 2000, pp. 3083-3087
Copyright ©2000 by the American Physiological Society

RAPID COMMUNICATION

Brief and Short-Term Corticofugal Modulation of Subcortical Auditory Responses in the Big Brown Bat, Eptesicus fuscus

Xiaoming Zhou and Philip H.-S. Jen

Division of Biological Sciences, University of Missouri, Columbia, Missouri 65211

Zhou, Xiaoming and Philip H.-S. Jen. Brief and Short-Term Corticofugal Modulation of Subcortical Auditory Responses in the Big Brown Bat, Eptesicus fuscus. J. Neurophysiol. 84: 3083-3087, 2000. Recent studies show that the auditory corticofugal system modulates and improves ongoing signal processing and reorganizes frequency map according to auditory experience in the central nucleus of bat inferior colliculus. However, whether all corticofugally affected collicular neurons are involved in both types of modulation has not been determined. In this study, we demonstrate that one group (51%) of collicular neurons participates only in corticofugal modulation of ongoing signal processing, while a second group (49%) of collicular neurons participates in both modulation of ongoing signal processing and in reorganization of the auditory system.






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