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Axonal Delay Lines for Time Measurement in the Owl's Brainstem

Carr, Catherine E. and Konishi, Masakazu (1988) Axonal Delay Lines for Time Measurement in the Owl's Brainstem. Proceedings of the National Academy of Sciences of the United States of America, 85 (21). pp. 8311-8315. ISSN 0027-8424. PMCID PMC282419.

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Interaural time difference is an important cue for sound localization. In the barn owl (Tyto alba) neuronal sensitivity to this disparity originates in the brainstem nucleus laminaris. Afferents from the ipsilateral and contralateral magnocellular cochlear nuclei enter the nucleus laminaris through its dorsal and ventral surfaces, respectively, and interdigitate in the nucleus. Intracellular recordings from these afferents show orderly changes in conduction delay with depth in the nucleus. These changes are comparable to the range of interaural time differences available to the owl. Thus, these afferent axons act as delay lines and provide anatomical and physiological bases for a neuronal map of interaural time differences in the nucleus laminaris.

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Additional Information:Copyright © 1988 by the National Academy of Sciences Contributed by Masakazu Konishi, July 15, 1988 We thank Ted Sullivan and Larry Proctor for advice and the use of data analysis programs, and Ted Bullock, Walter Heiligenberg, Eric Knudsen, Andy Moiseff, Terry Takahashi, Susan Volman, and Hermann Wagner for reading this manuscript. This work was supported by National Institutes of Health Grant NS14617 to M.K. and National Research Service Award NS07475 to C.E.C. The publication costs of this article were defrayed in part by page charge payment. This article must therefore be hereby marked "advertisement" in accordance with 18 U.S.C. §1734 solely to indicate this fact.
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Subject Keywords:sound localization; auditory system; nucleus laminaris; neural map; Tyto alba
PubMed Central ID:PMC282419
Record Number:CaltechAUTHORS:CARpnas88
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:7005
Deposited By: Archive Administrator
Deposited On:04 Jan 2007
Last Modified:11 Nov 2015 21:50

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