Document Detail


The visual connections of the adult flatfish, Achirus lineatus.
MedLine Citation:
PMID:  1150924     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Metamorphosis in the flatfish is characterized by the migration of one eye around the dorsal surface of the head to a position adjacent to the other eye on the new top side of the animal. The visual connections of the adult flatfish, Achirus lineatus, were examined. Either the migrating or non-migrating eye was removed and the animal allowed to survive for one to three weeks. Alternate sections of the brain were stained by a modification of the Fink-Heimer technique, or with cresyl violet. The diencephalic visual connections of the flatfish were similar to those of other teleosts with contralateral projections to the nuclei corticalis, dorsomedialis thalami, pretectalis, and the corpus geniculatum laterale. The distribution of the retinal efferents to the optic tectum is unique in the flatfish. In the medial one-third of the tectum, terminal degeneration was found in three bands in the stratum opticum (SO) and the stratum griseum et fibrosum superficiale (sgfs). In the middle part of the tectum, two bands of degeneration remained over the sgfs. The lateral part of the tectum has only a very small amount of degeneration distributed radomly in scattered clusters over the deep SO and superficial sgfs. The Nissl preparations also reflected the differences between the medial and lateral parts of the tectum. Distinct layer was lacking in the medial tectum with a conspicuously absent large cell layer in the stratum griseum centrale (sgc). In contrast, the lateral tectum had a typical tectal stratification. Most notable were the large neurons of the sgc.
Authors:
R L Gulley; M Cochran; S O Ebbesson
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of comparative neurology     Volume:  162     ISSN:  0021-9967     ISO Abbreviation:  J. Comp. Neurol.     Publication Date:  1975 Aug 
Date Detail:
Created Date:  1975-11-06     Completed Date:  1975-11-06     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0406041     Medline TA:  J Comp Neurol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  309-19     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Diencephalon / anatomy & histology
Eye / enzymology,  growth & development*
Fishes / anatomy & histology*
Metamorphosis, Biological
Nerve Degeneration
Nervous System / growth & development*
Ocular Physiological Phenomena
Optic Nerve / anatomy & histology
Superior Colliculi / anatomy & histology
Telencephalon / anatomy & histology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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