Revised January 2007.
The first in a 5-part series, offers an understanding of the brain, how the reward center works, and what happens in the brain when a person uses cocaine, opiates (heroine), or marijuana.
Published January 1997. Revised January 2009.
Describes how opiates, such as Vicodin, morphine, heroin, and codeine, affect the brain, the nervous system, and the limbic system, which controls emotions. En Español