Bilateral retinal projections in the black piranah (Serrasalmus niger) |
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| Authors: | Prof Sven O E Ebbesson Hironobu Ito |
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| Institution: | (1) Department of Anatomy, Catholic University Medical School, Ponce, Puerto Rico, USA;(2) Institut für Zoologie, Technische Hochschule, Darmstadt, Bundesrepublik Deutschland;(3) Culebra Biological Station, Culebra, Puerto Rico, USA;(4) Department of Anatomy, Osaka University Medical School, Osaka, Japan;(5) Institut für Zoologie, Technische Hochschule, Schnittspahnstr. 3, 6100 Darmstadt, Germany |
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| Abstract: | Summary The retinal projections were studied in the black piranah (Serrasalmus niger) with degeneration and autoradiographic methods. The projections are bilateral to the hypothalamic optic nucleus, the dorsomedial optic nucleus, corpus geniculatum ipsum of Meader (1934) and the optic tectum. Unilateral, crossed projections were traced to the pretectal nucleus and the cortical nucleus. The visual system of the black piranah is exceptionally well developed but has retained many primitive features including the extensive bilateral projections. |
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| Keywords: | Visual system Thalamus Optic tectum Teleosts Autoradiography |
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