Fundamental neurosciences deals with the biology of neurons and their communication, with the physiology of sensation, perception, action and decision, and how these levels of analysis fit into the behavior and cognition of organisms. Clinical neurosciences seek to understand, predict, diagnose and cure neurological and psychiatric disorders and diseases of the sense organs. In addition to scientific and medical challenges, the development of neurosciences also represents significant society, ethical and legal challenges. Understanding human cognition can, for example, provide food for thought on teaching methods and the best ways to pass on to all student levels. A psychiatric examination is often required by the law to rule on the responsibility of individuals and the use of new brain observation methods by imaging has provoked ethical debate worldwide.