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Cytoarchitecture of the medial octavolateralis nucleus in the goldfish, Carassius auratus
Author(s) -
New John G.,
Coombs Sheryl,
McCormick Catherine A.,
Oshel P.E.
Publication year - 1996
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/(sici)1096-9861(19960311)366:3<534::aid-cne11>3.0.co;2-p
Subject(s) - cytoarchitecture , biology , nucleus , neuroscience , anatomy , sensory system , neuroanatomy , granule cell , central nervous system , dentate gyrus
The medial octavolateralis nucleus (MON) is the principal first‐order medullary lateral line sensory nucleus found in the majority of anamniotic vertebrates. Although its presence has been confirmed in numerous taxa, the cytoarchitecture of this region has not been extensively studied in any species. The purpose of this study was to examine in detail the cytoarchitecture of the MON in the goldfish using Golgi staining and HRP histochemical techniques. The results of this study demonstrated the presence of a number of cell types with distinct cellular morphologies, several of which strongly resemble those described in octavolateralis nuclei dedicated to audition and electroreception. The most prominent of these MON neurons included crest cells of two varieties, either possessing or lacking basilar dendrites. Additionally, we described stellate and cristal interneurons and granule‐like cells in the molecular layer, and lateral interneurons and granule‐like neurons in deeper MON layers. These morphological similarities together with similarities in functional organization, and the probable close phyletic relationships of this “family” of hair cell sensory systems, argue for parallels in mechanisms of sensory processing and analysis in strongly divergent sensory modalities. © 1996 Wiley‐Liss, Inc.