Examlex
During drug withdrawal,symptoms appear that are opposite of the symptoms of drug use.
Pain-killing Neurotransmitters
Chemical substances in the nervous system that reduce the sensation of pain, such as endorphins.
Foot Shocks
Unpleasant electric shocks applied to the feet, often used in behavioral experiments to study learning and conditioning.
Barbiturates
A class of drugs that are used as sedatives and hypnotics, and can affect the central nervous system.
Cocaine
A powerful stimulant drug derived from the leaves of the coca plant, often used recreationally for its euphoric effects.
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