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Projections of nucleus angularis and nucleus laminaris to the lateral lemniscal nuclear complex of the barn owl

Takahashi, Terry T. and Konishi, Masakazu (1988) Projections of nucleus angularis and nucleus laminaris to the lateral lemniscal nuclear complex of the barn owl. Journal of Comparative Neurology, 274 (2). pp. 212-238. ISSN 0021-9967. http://resolver.caltech.edu/CaltechAUTHORS:20151201-144304373

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Abstract

Interaural phase and intensity are cues by which the barn owl determines, respectively, the azimuth and elevation of a sound source. Physiological studies indicate that phase and intensity are processed independently in the auditory brainstem of the barn owl. The phases of spectral components of a sound are encoded in nucleus magnocellularis (NM), one of the two cochlear nuclei. NM projects solely and bilaterally to nucleus laminaris (NL), wherein interaural phase difference is computed. The other cochlear nucleus, nucleus angularis (NA), encodes the amplitudes of spectral components of sounds. We report here the projections of NA and NL to the lateral lemniscal nuclei of the barn owl. The lateral lemniscal complex comprises nucleus olivaris superior (SO); nucleus lemnisci lateralis, pars ventralis (LLv); and nucleus ventralis lemnisci lateralis (VLV). At caudal levels, VLV may be divided into a posterior (VLVp) and an anterior (VLVa) subdivision on cytoarchitectonic grounds. At rostral levels, the cytoarchitectural differences diminish and the boundaries between the two subdivisions become obscured. Likewise, our data from anterograde tracing studies suggest that at caudal levels the terminal fields of NA and NL remain confined to VLVp and VLVa, respectively. They merge, however, at rostral levels. The data also suggest that NL projects to the medial portion of the ipsilateral SO and that NA projects bilaterally to all parts of SO and LLv. Studies with the retrograde transport of horseradish peroxidase confirm these projections.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/cne.902740207DOIArticle
http://onlinelibrary.wiley.com/doi/10.1002/cne.902740207/abstractPublisherArticle
Additional Information:© 1988 Alan R. Liss, Inc. Manuscript Accepted: 1 Mar 1988.
Subject Keywords:cochlear nucleus; medial superior olivary nucleus; sound localization; binaural; parallel processing
Record Number:CaltechAUTHORS:20151201-144304373
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20151201-144304373
Official Citation:Takahashi, T. T. and Konishi, M. (1988), Projections of nucleus angularis and nucleus laminaris to the lateral lemniscal nuclear complex of the barn owl. J. Comp. Neurol., 274: 212–238. doi: 10.1002/cne.902740207
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62516
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:03 Dec 2015 02:48
Last Modified:03 Dec 2015 02:48

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