Degeneration of nerve fibres within the embryonic spinal cord.
D000818:Animals; D001001:Anura; D008675:Metamorphosis, Biological; D008854:Microscopy, Electron; D009410:Nerve Degeneration; D009454:Neurofibrils / Q000166:cytology*; D013116:Spinal Cord / Q000196:embryology*