Psychodynamics, also known as psychodynamic psychology, in its broadest sense, is an approach to psychology that emphasizes systematic study of the psychological forces underlying human behavior, feelings, and emotions and how they might relate to early experience. It is especially interested in the dynamic relations between conscious motivation and unconscious motivation.

Ernst Wilhelm Ritter von Brücke was a German physician and physiologist. He is credited with contributions made in many facets of physiology.