Downward causation?
D001921:Brain / Q000502:physiology; D002490:Central Nervous System / Q000033:anatomy & histology / Q000196:embryology / Q000502:physiology*; D002540:Cerebral Cortex / Q000033:anatomy & histology; D046508:Culture Techniques; D006801:Humans; D008954:Models, Biological; D009046:Motor Neurons / Q000502:physiology; D009132:Muscles / Q000294:innervation; D009417:Nerve Tissue / Q000502:physiology; D009474:Neurons / Q000502:physiology; D013569:Synapses / Q000502:physiology