Presumptive FMRF-amide-like immunoreactive retinopetal fibres in Crocodylus niloticus.
A small contingent of 30-50 of centrifugal visual fibres, showing FMRF-amide-like immunoreactivity, has been identified in C. niloticus; these fibres extend from the chiasmatic region into the retina. They do not take the marginal optic tract, but pass medially to the chiasmatic fascicles, from the preoptic region. The cells of origin of these fibres have not been identified. However, none of the retinopetal neurons of the brainstem [M. Medina, J. Reperant, R. Ward, D. Miceli, Centrifugal visual system of Crocodylus niloticus : a hodological, histochemical and immunocytochemical study, J. Comp. Neurol. 468 (2004) 65-85], labelled by retrograde transport of rhodamine beta-isothiocyanate after intraocular injection of this tracer, show FMRF-amide-like immunoreactivity; neither are any of the FMRF-amide-like immunopositive neurons in the crocodile brain, particularly those of the complex involving the terminal nerve and the septo-preoptic region, labelled by rhodamine after its intraocular injection.
Laboratoire d'Anatomie Comparée, Muséum National d'Histoire Naturelle, Département Ecologie et Gestion de la Biodiversité, CNRS FRE2696-MNHN USM0302 CP 55, 55 rue Buffon, F-75005 Paris, France. medina@mnhn.fr
Monique
M
Médina
Jacques
J
Repérant
Roger
R
Ward
Dom
D
Miceli
D000489:Alligators and Crocodiles / Q000378:metabolism*; D000818:Animals; D019835:FMRFamide / Q000032:analysis* / Q000096:biosynthesis*; D007150:Immunohistochemistry; D012160:Retina / Q000737:chemistry* / Q000378:metabolism*; D014795:Visual Pathways / Q000737:chemistry / Q000378:metabolism
D019835:FMRFamide