Featured Term:  "Dopamine"
A brain chemical, classified as a neurotransmitter, found in regions of the brain that regulate movement, emotion, motivation, and pleasure. (National Institute on Drug Abuse)

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Note: Join Together definitions were adapted from:

Cermak, T. L. (1986). Diagnosing and Treating Codependence. Johnson Institute Books, Minneapolis, MN.
Maisto, S. A., Galizio, M. And Connors, G. J. (1991). Drug Use and Misuse, Hold, Rinehart and Winston, Inc., Fort Worth, TX.
Ray, O. (1990). Drugs, Society and Human Behavior, Times Mirror/Mosby, College Publishing, St. Louis.
Schuckit, M. A. (1998). Educating Yourself about Alcohol and Drugs: A People's Primer. Plenum Trade: New York.

Terms from Addiction Resource Guide