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Rules of order in the retinotectal fascicles of goldfish

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1984

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Easter, Stephen S.

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Published

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Journal of Neuroscience. 1984, 4(4), pp. 1045-1051

Zusammenfassung

Individual fascicles of retinal axons were labeled in the goldfish tectum with horseradish peroxidase (HRP). The contralateral retina was later processed for HRP histochemistry to mark the cells that had axons in the fascicles. Labeled cells were found in a partial half anulus in ventral hemiretina, centered on the optic disk. The distance of the partial anulus from the disk depended on which tectal fascicle had been labeled; the more rostrocentral the fascicle, the smaller was the annular radius. The angular subtense of the partial anulus with respect to the disk depended on where (along its tectal course) the fascicle had been labeled; the more rostral the label site, the longer was the angular subtense. These results were interpreted in the context of retinotectal growth, and it was inferred that the axons followed two rules: (1) grow in along the edge of the tectum and (2) exit and terminate in order, axons from temporal retina first, nasal retina last. These rules would produce a retinotopic projection in peripheral tectum, but they require that some of the terminals already in place must shift as the tectum grows.

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570 Biowissenschaften, Biologie

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ISO 690STÜRMER, Claudia, Stephen S. EASTER, 1984. Rules of order in the retinotectal fascicles of goldfish. In: Journal of Neuroscience. 1984, 4(4), pp. 1045-1051
BibTex
@article{Sturmer1984Rules-8577,
  year={1984},
  title={Rules of order in the retinotectal fascicles of goldfish},
  number={4},
  volume={4},
  journal={Journal of Neuroscience},
  pages={1045--1051},
  author={Stürmer, Claudia and Easter, Stephen S.}
}
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