Energy is a concept in some psychological theories or models of a postulated unconscious mental functioning on a level between biology and consciousness.
During this year, at the University of Vienna, Brücke served as supervisor for first-year medical student Sigmund Freud who adopted this new "dynamic" physiology.
In his Lectures on Physiology, Brücke set forth the then-radical view that the living organism is a dynamic system to which the laws of chemistry and physics apply.
The origins of Freud's basic model, based on the fundamentals of chemistry and physics, according to John Bowlby, stems from Brücke, Meynert, Breuer, Helmholtz, and Herbart.
The Myers–Briggs Type Indicator divides people into 16 categories based on whether certain activities leave them feeling energized or drained of energy.
[6] The modern neuroscientific view is that brain metabolism, measured by functional magnetic resonance imaging or positron emission tomography, is a physical correlate of mental activity.
Also, the studies document the efficacy of energy psychology methods for the treatment of physical pain, anxiety, depression, cravings, trauma, PTSD, and peak athletic performance.