The development of descending and dorsal root connections in the lumbosacral spinal cord of the postnatal rat.
D000818:Animals; D000831:Animals, Newborn; D006614:Hindlimb / Q000294:innervation; D008854:Microscopy, Electron; D009475:Neurons, Afferent; D051381:Rats; D013116:Spinal Cord / Q000254:growth & development* / Q000648:ultrastructure; D013126:Spinal Nerve Roots / Q000254:growth & development*; D013569:Synapses / Q000648:ultrastructure