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Article: Spreading of hemiretinal projections in the ipsilateral tectum following unilateral enucleation: a study of optic nerve regeneration in Xenopus with one compound eye.

TitleSpreading of hemiretinal projections in the ipsilateral tectum following unilateral enucleation: a study of optic nerve regeneration in Xenopus with one compound eye.
Authors
Issue Date1981
Citation
Journal Of Embryology And Experimental Morphology, 1981, v. 61, p. 259-276 How to Cite?
AbstractRight compound eyes were formed in Xenopus embryos at stages 32-33 by the fusion of two nasal (NN), two ventral (VV) or two temporal (TT) halves. Shortly after metamorphosis the optic nerve from the compound eye was sectioned and the left intact eye removed. The retinotectal projections from the compound eye to the contralateral and ipsilateral tecta were studied by [3H]proline autoradiography and electrophysiological mapping between 6 weeks and 5 months after the postmetamorphic surgery. The results showed that NN and VV eyes projected to the entire extent of both tecta. In contrast, optic fibre projection from TT eyes, although more extensive than the normal temporal hemiretinal projection, failed to cover the caudomedial portion of the tecta. The visuotectal projections in all three combinations corresponded to typical reduplicated maps to be expected from such compound eyes, where each of the hemiretinae projected across the contralateral and ipsilateral tecta in an overlapping fashion. The rapid expansion of the hemiretinal projections of the compound eyes in the ipsilateral tectum following the removal of the resident optic fibre projection suggests that tectal markers may be carried and deployed by the incoming optic fibres themselves.
Persistent Identifierhttp://hdl.handle.net/10722/149430
ISSN
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorStraznicky, Cen_US
dc.contributor.authorTay, Den_US
dc.date.accessioned2012-06-26T05:53:35Z-
dc.date.available2012-06-26T05:53:35Z-
dc.date.issued1981en_US
dc.identifier.citationJournal Of Embryology And Experimental Morphology, 1981, v. 61, p. 259-276en_US
dc.identifier.issn0022-0752en_US
dc.identifier.urihttp://hdl.handle.net/10722/149430-
dc.description.abstractRight compound eyes were formed in Xenopus embryos at stages 32-33 by the fusion of two nasal (NN), two ventral (VV) or two temporal (TT) halves. Shortly after metamorphosis the optic nerve from the compound eye was sectioned and the left intact eye removed. The retinotectal projections from the compound eye to the contralateral and ipsilateral tecta were studied by [3H]proline autoradiography and electrophysiological mapping between 6 weeks and 5 months after the postmetamorphic surgery. The results showed that NN and VV eyes projected to the entire extent of both tecta. In contrast, optic fibre projection from TT eyes, although more extensive than the normal temporal hemiretinal projection, failed to cover the caudomedial portion of the tecta. The visuotectal projections in all three combinations corresponded to typical reduplicated maps to be expected from such compound eyes, where each of the hemiretinae projected across the contralateral and ipsilateral tecta in an overlapping fashion. The rapid expansion of the hemiretinal projections of the compound eyes in the ipsilateral tectum following the removal of the resident optic fibre projection suggests that tectal markers may be carried and deployed by the incoming optic fibres themselves.en_US
dc.languageengen_US
dc.relation.ispartofJournal of Embryology and Experimental Morphologyen_US
dc.subject.meshAction Potentialsen_US
dc.subject.meshAnimalsen_US
dc.subject.meshAutoradiographyen_US
dc.subject.meshNerve Regenerationen_US
dc.subject.meshOptic Nerve - Embryology - Physiologyen_US
dc.subject.meshSuperior Colliculi - Embryology - Physiologyen_US
dc.subject.meshVisual Fieldsen_US
dc.subject.meshVisual Pathways - Embryology - Physiologyen_US
dc.subject.meshXenopus - Embryologyen_US
dc.titleSpreading of hemiretinal projections in the ipsilateral tectum following unilateral enucleation: a study of optic nerve regeneration in Xenopus with one compound eye.en_US
dc.typeArticleen_US
dc.identifier.emailTay, D:dkctay@hkucc.hku.hken_US
dc.identifier.authorityTay, D=rp00336en_US
dc.description.naturelink_to_OA_fulltexten_US
dc.identifier.pmid7264545en_US
dc.identifier.scopuseid_2-s2.0-0019429080en_US
dc.identifier.volume61en_US
dc.identifier.spage259en_US
dc.identifier.epage276en_US
dc.identifier.isiWOS:A1981LF32500019-
dc.identifier.scopusauthoridStraznicky, C=7004293883en_US
dc.identifier.scopusauthoridTay, D=7006796825en_US

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