[Motor activity--3. Spinal cord control of the brain].
D000818:Animals; D001921:Brain / Q000502:physiology*; D002415:Cats; D005116:Extrapyramidal Tracts / Q000502:physiology; D006801:Humans; D009043:Motor Activity / Q000502:physiology*; D009046:Motor Neurons / Q000502:physiology; D051381:Rats; D013116:Spinal Cord / Q000502:physiology*