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  • Title: The central projections in the retina in Necturus maculosus.
    Author: Caldwell JH, Berman N.
    Journal: J Comp Neurol; 1977 Feb 15; 171(4):455-63. PubMed ID: 833353.
    Abstract:
    The projections of the retina in Necturus maculosus were studied by injecting radioactive proline into one eye. Labeling was seen in both the contralateral and ipsilateral diencephalon and tectum. The contralateral fibers are divided into three major tracts: the marginal, axial, and basal. The ipsilateral fibers separate into a marginal and an axial optic tract. The contralateral and ipsilateral axial optic tracts have a similar distribution. The contralateral and ipsilateral marginal optic tracts projecting to the diencephalon also have a similar distribution. However, in the tectum the ipsilateral marginal optic tract ends in the anterior third while the contralateral extends almost the entire length of the tectum. The retinotectal ipsilateral projection ends in clumps as has been described in other vetebrates. A direct ipsilateral retinotectal projection has not been described in any other amphibian.
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