Five paths to understanding.
D001921:Brain / Q000033:anatomy & histology / Q000502:physiology; D049668:History, 15th Century; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049674:History, 21st Century; D049690:History, Ancient; D049691:History, Medieval; D006801:Humans; D001523:Mental Disorders / Q000266:history*; D009488:Neurosciences / Q000266:history*; D011584:Psychology / Q000266:history*