Retino-fugal projections in congenitally monophthalmic fish and anurans |
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Authors: | Cordula R Malz Susanne Pritz Dietrich L Meyer |
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Institution: | (1) Zentrum Anatomie der Universität, Kreuzbergring 36, W-3400 Göttingen, Federal Republic of Germany |
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Abstract: | Summary Intra-ocular deposition of horseradish peroxidase was used to visualize optic tract projections in normal and congenitally monophthalmic catfish and Xenopus. In neither species was evidence for an increased ipsilateral visual component found in congenitally one-eyed specimens. This indicates that competition between axons from both eyes is not an important mechanism for fiber distribution in the chiasm during ontogeny. Furthermore, it suggests that enhanced ipsilateral components, previously noted in unilaterally enucleated fish and anurans, are caused by debris of degenerated axons. |
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Keywords: | Visual system Optic chiasm Ontogeny Ictahurus nebulosus (Teleostei) Xenopus laevis (Anura) |
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