title: Ontogeny of substrate pathways and the origin of the neural circuit pattern.
mesh_terms: D000818:Animals; D001369:Axons / Q000502:physiology; D002454:Cell Differentiation; D002490:Central Nervous System / Q000196:embryology*; D002633:Chemotaxis; D004627:Embryonic Induction; D066298:In Vitro Techniques; D051379:Mice; D009024:Morphogenesis; D009414:Nerve Growth Factors / Q000494:pharmacology; D009434:Neural Pathways / Q000196:embryology; D009457:Neuroglia / Q000502:physiology; D012038:Regeneration; D012455:Salamandridae / Q000196:embryology; D013116:Spinal Cord / Q000502:physiology; D013564:Sympathetic Nervous System / Q000502:physiology; D014981:Xenopus
chemical_list: D009414:Nerve Growth Factors