title: Nature and significance of spontaneous degeneration of axons in the pyramidal tract.
mesh_terms: D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn; D001345:Autoradiography; D001369:Axons / Q000166:cytology*; D004622:Embryo, Mammalian / Q000033:anatomy & histology; D005865:Gestational Age; D002479:Inclusion Bodies; D008854:Microscopy, Electron; D008928:Mitochondria; D009410:Nerve Degeneration; D009420:Nervous System / Q000196:embryology; D011712:Pyramidal Tracts / Q000166:cytology* / Q000196:embryology / Q000254:growth & development; D051381:Rats; D011919:Rats, Inbred Strains