Tectectomy in the cyclopean salamander
| Autor: | Carl W. Schneider, Paul Pietsch |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Superior Colliculi
genetic structures Enucleation Eye transplantation Experimental and Cognitive Psychology Skin Pigmentation Biology Cyclops Ambystoma Behavioral Neuroscience Axolotl biology.animal Animals Visual Pathways Vision Ocular Melanosome Caudata Brain Mapping Optic Nerve Anatomy biology.organism_classification eye diseases Nerve Regeneration body regions Transplantation Salamander Melanocytes sense organs Sensory Deprivation |
| Zdroj: | Physiologybehavior. 50(2) |
| ISSN: | 0031-9384 |
| Popis: | In an Ambystoma larva with both natural eyes removed and one eye grafted atop the head (Cyclops preparation), vision-dependent behavior usually recovers from the enucleation inherent in the operation, but the optically activated skin blanching reaction reappears in a very small number of instances. In the present studies, while the latter trend continued for the conventional Cyclops preparation, tectectomy concurrent with the ectopic eye transplantation resulted in a several-fold increase in the recovery of blanching competency. Some 60 percent of the tectectomized Cyclops animals exhibited the same Hogben-Slome pigmentation indices as larvae with one natural eye intact (controls). As measured planimetrically with an image analyzer, the pigment spots (melanosome containing portions of dermal melanocytes) contracted to the same extent in the blanch-competent Cyclops animals as in controls with a single natural eye. |
| Databáze: | OpenAIRE |
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