Complex sentence: Conscious and unconscious components are hypothesized to serve as mechanisms responsible for the maintance of drug addiction: conscious mechanisms involve craving associated with loss of control and unconscious elements include anticipated conditioned responses to a drug and impulsivity Volkow, N.D., Fowler, J.S. (2000).
Split into simpler sentences: Conscious and unconscious components are hypothesized to serve as mechanisms responsible for maintance drug addiction. Conscious mechanisms involve craving associated with loss of control and unconscious elements include anticipated conditioned response to a drug and impulsivity Volkow, N.D., Fowler, J.S. (2000).