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Addiction is a neurological disorder that affects the reward system in the brain. In a healthy person, the reward system reinforces important behaviors that are essential for survival such as feeding, sexual activity, and social interaction. For example, the reward system ensures that you docHub for food when you are hungry, because you know that after eating you will feel good. In other words, it makes the activity of eating pleasurable and memorable, so you would want to do it again and again whenever you feel hungry. Drugs of abuse hijack this system, turning the persons natural needs into drug needs. The brain consists of billions of nerve cells, or neurons, which communicate via chemical messages, or neurotransmitters. When a neuron is sufficiently stimulated, an electrical impulse called an action potential is generated and travels down the axon to the nerve terminal. Here, it triggers the release of a neurotransmitter into the synaptic cleft - a s
