Summary
The retinal projections of the caecilian Ichthyophis kohtaoensis were investigated by anterograde transport of HRP. The optic tract forms two bundles in the diencephalon, a narrow medial bundle in the optic tectum, and a basal optic tract consisting of few fibres. Terminal fields are in the thalamus, pretectum, tectum, and as a circum-scribed basal optic neuropile in the tegmentum. Thalamic, pretectal and tectal projections are contralateral as well as ipsilateral. The reduced but existing visual projection corresponds to a reduced but existing visually guided behaviour.
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References
Engelhardt F (1924) Tentakelapparat und Auge von Ichthyophis. Jana Z Naturw 60:241–304
Ewert JP (1971) Single unit response of the toad's (Bufo americanus) caudal thalamus to visual objects. Z vergl Physiol 74:81–102
Fite KV, Scalia F (1976) Central visual pathways in the frog. In: Fite KV (ed) The amphibian visual system. Academic Press, New York, p 87–118
Fritzsch B (1980) Retinal projections in European Salamandridae. Cell Tissue Res 213:325–341
Hanke V (1913) Die rudimentären Sehorgane einiger Amphibien und Reptilien. Arch vergl Ophthalmol 3:120–180
Himstedt W (1982) Evolutionary aspects of color vision in amphibians. In: Mossakowski D, Roth G (eds) Environmental adaptation and evolution. Fischer, Stuttgart, p 67–85
Kuhlenbeck H (1922) Zur Morphologie des Gymnophionengehirns. Jena Z Naturw 58:453–484
Lázár G (1971) The projection of the retinal quadrants on the optic centres in the frog. Acta Morphol Acad Sci Hung 19:325–334
Lázár G (1978) Application of cobalt-filling technique to show retinal projections in the frog. Neuroscience 3:725–736
Levine RL (1980) An autoradiographic study of the retinal projection in Xenopus laevis with comparisons to Rana. J Comp Neurol 189:1–29
Manteuffel G, Petersen J, Himstedt W (1983) Optic nystagmus and nystagmogen centers in the European fire salamander (Salamandra salamandra). Zool Jahrb Physiol 87:113–125
Mesulam MM, Hegarthy E, Barbas H, Carson KA, Gower EC, Knapp AG, Moss MB, Mufson EJ (1980) Additional factors influencing sensitivity in the tetramethyl benzidine method for horseradish peroxidase neurohistochemistry. J Histochem Cytochem 28:1255–1259
Montgomery N, Fite KV, Taylor M, Bengston L (1982) Neuronal correlates of optokinetic nystagmus in the mesencephalon of Rana pipiens: a functional analysis. Brain Behav Evol 21:137–150
Muntz WRA (1962) Effectiveness of different colors of light in releasing the positive phototactic behavior in frogs, and a possible function of the retinal projection to the diencephalon. J Neurophysiol 25:712–720
Rettig G, Roth G (1982) Afferent visual projections in three species of lungless salamanders (family Plethodontidae). Neurosci Lett 31:221–224
Roth G, Grunwald W, Linke R, Rettig G, Rottluff B (1983) Evolutionary patterns in the visual system of lungless salamanders (Fam. Plethodontidae). Arch Biol Med Exp 16:329–341
Scalia F (1976) The optic pathway of the frog: nuclear organization and connections. In: Llinás R, Precht W (eds) Frog neurobiology. Springer, Berlin, pp 386–406
Siminoff R, Schwassmann HO, Kruger L (1967) Unit analysis of the pretectal nuclear group in the rat. J Comp Neurol 130:329–342
Storch V, Welsch U (1973) Zur Ultrastruktur von Pigmentepithel und Photoreceptoren der Seitenaugen von Ichthyophis kohtaoensis (Gymnophiona, Amphibia). Zool Jahrb Anat 90:160–173
Wake MH (1980) Morphological information on caecilian eye function. Am Zool 20:785
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Himstedt, W., Manteuffel, G. Retinal projections in the caecilian Ichthyophis kohtaoensis (Amphibia, Gymnophiona). Cell Tissue Res. 239, 689–692 (1985). https://doi.org/10.1007/BF00219250
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DOI: https://doi.org/10.1007/BF00219250