ADDICTION, ALCOHOL, ARTWORK, BACKGROUND, BIOLOGY, BODY, BRAIN, CELLS, CHAINED, CIRCUIT, COCAINE, CONCEPTS, CONCEPTUAL, CONSUMING, CORTEX, CYCLE, DANGER, DEPENDENCY, DESIGN, DISORDER, DOPAMINE, DRUG, EMOTIONAL, FUNCTION, HEAD, IMPULSE, INFLUX, LEVEL, MARIJUANA, MEDICINE, NERVOUS, NETWORK, NEUROBIOLOGY, NEUROLOGY, NEURONS, NEUROTRANSMITTERS, NICOTINE, NO-ONE, NOBODY, OPIOIDS, PATHWAY, PLEASURE, PURPLE, RECEPTOR, REGION, REWARD, REWARDING, STIMULATION, SUBSTANCE, SYNAPSE, SYSTEM,