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Term Definition
barbituratesDepressant drugs that produce relaxation and sleep. Barbiturates include sleeping pills such as pentobarbital (Nembutal) and secobarbital (Seconal).

basal gangliaThe large, complex set of brain structures involved in generating movements, in some cognitive functions, and in some emotional and motivational activities. The basal ganglia and the cerebral cortex work together to refine movements, thoughts, and feelings.

behaviorThe observable activity of humans and animals.

behaviorismThe study of behavior, especially using operant conditioning.

benzodiazepinesThe so-called "minor" tranquilizers, depressants, which relieve anxiety and produce sleep. Benzodiazepines include tranquilizers such as diazepam (Valium) and alprazolam (Xanax) and sleeping pills such as flurazepam (Dalmane) and triazolam (Halcion).

bindWhat occurs when a neurotransmitter attaches itself to a receptor. The neurotransmitter is said to "bind" to the receptor.

bingeUninterrupted consumption of a drug for several hours or days.

bolusA concentrated amount of drug; a dose injected rapidly into a vein, a rounded mass of matter.

brainThat part of the central nervous system inside our heads. Our brain is the seat of all our perceptions, thoughts, feelings and voluntary movements.

brain reward systemA brain circuit that, when activated, reinforces behaviors. The circuit includes the dopamine-containing neurons of the ventral tegmental area, the nucleus accumbens, and part of the prefrontal cortex. We perceive the activation of this circuit as pleasure.

brain stemThe relatively primitive brain structure that starts where our spinal cord enters our head. Neurons within the brain stem control basic functions such as heart rate and breathing.

BuprenorphineA long-lasting opiate analgesic that has both opiate agonist and antagonist properties. Buprenorphine shows promise for treating heroin addiction.

Special Thanks:
Addiction Studies Program - Wake Forest University School of Medicine
False Messengers: How Addictive Drugs Change the Brain by David Friedman, PhD, and Sue Rusche, Harwood Academic Publishers, Amsterdam, The Netherlands, 1999. [www.addictionstudies.org]