Retinal projections in the caecilian Ichthyophis kohtaoensis (Amphibia, Gymnophiona).
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 circumscribed 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.
D000663:Amphibians / Q000033:anatomy & histology*; D000818:Animals; D006735:Horseradish Peroxidase; D012160:Retina / Q000166:cytology*; D014795:Visual Pathways / Q000166:cytology*
D006735:Horseradish Peroxidase