title: Deployment of optic nerve fibers is determined by positional markers in the frog's tectum.
mesh_terms: D000818:Animals; D001001:Anura; D001931:Brain Mapping; D009416:Nerve Regeneration; D009434:Neural Pathways / Q000502:physiology; D009900:Optic Nerve / Q000254:growth & development* / Q000502:physiology; D012160:Retina / Q000502:physiology; D013477:Superior Colliculi / Q000033:anatomy & histology / Q000502:physiology*; D014981:Xenopus