J Peyrichoux

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The retinal projections of the shark Scyliorhinus canicula were investigated using both the degeneration technique after eye removal and the radioautographic method following the intraocular injection of various tritiated tracers (proline, leucine, fucose, adenosine). The results showed contralateral projection via different optic tract components (TOM,(More)
The axoplasmic transport of [3H]adenosine (or its related compounds) has been examined radioautographically in the visual system of a poïkilotherm species (Vipera aspis) following an intraocular injection of the nucleoside. It has been found that the axonal transport of the label occurs both in the anterograde directions. Furthermore, a considerable(More)
A quantitative investigation of the optic nerves of eight adult vipers was carried out, both at the level of resolution of the light microscope by stereological methods, and at the level of resolution of the electron microscope. The majority (87%) of axons are myelinated, and the fibers are organized in fascicles; each bundle of axons is disposed around a(More)
The superficial layers of the viper optic tectum, which receive fibers from he retina, were studied using both light and electron microscopes. The optic fibers layer, or stratum opticum, is composed of 200 to 250 tight fascicles containing thin fibers, nearly all of which are myelinated. The main optic terminal layers, the stratum griseum et fibrosum(More)
Crushing or freezing the optic nerve of the viper leads initially to the anterograde degeneration of the optic nerve fibers and to an extensive retrograde demyelination process associated with the degeneration of some retinal ganglion cells. By the 45th postoperative day, regenerating unmyelinated axons can be identified in the damaged region of the optic(More)
The basal optic system of the reptile Vipera aspis was investigated under both light and electron microscopy. The basal optic root (BOR), mainly composed of large diameter myelinated fibers (congruent to 2 micrometers) terminates in he nucleus of the basal optic root (nBOR). The different histological techniques employed disclose a neuronal population(More)