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Substance dependence, also known as drug dependence, is a biopsychological situation whereby an individual's functionality is dependent on the necessitated re-consumption of a psychoactive substance because of an adaptive state that has developed within the individual from psychoactive substance consumption that results in the experience of withdrawal and that necessitates the re-consumption ...
t. e. Drug tolerance or drug insensitivity is a pharmacological concept describing subjects' reduced reaction to a drug following its repeated use. Increasing its dosage may re-amplify the drug's effects; however, this may accelerate tolerance, further reducing the drug's effects. Drug tolerance is indicative of drug use but is not necessarily ...
Substance use disorder (SUD) is the persistent use of drugs despite the substantial harm and adverse consequences to one's own self and others, as a result of their use. [7] [8] In perspective, the effects of the wrong use of substances that are capable of causing harm to the user or others, have been extensively described in different studies using a variety of terms such as substance use ...
Addiction affects the brain circuits of reward and motivation, learning and memory, and the inhibitory control over behavior. [24] There are different schools of thought regarding the terms dependence and addiction when referring to drugs and behaviors. One adopted belief is that "drug dependence" equals "addiction."
Psychological dependence is a cognitive disorder and a form of dependence that is characterized by emotional–motivational withdrawal symptoms upon cessation of prolonged drug use or certain repetitive behaviors. [ 4] Consistent and frequent exposure to particular substances or behaviors is responsible for inducing psychological dependence ...
Opponent-process theory. Opponent-process theory is a psychological and neurological model that accounts for a wide range of behaviors, including color vision. This model was first proposed in 1878 by Ewald Hering, a German physiologist, and later expanded by Richard Solomon, a 20th-century psychologist.
Cross-tolerance is a phenomenon that occurs when tolerance to the effects of a certain drug produces tolerance to another drug. It often happens between two drugs with similar functions or effects—for example, acting on the same cell receptor or affecting the transmission of certain neurotransmitters. Cross-tolerance has been observed with ...
Cue reactivity is a type of learned response which is observed in individuals with an addiction and involves significant physiological and psychological reactions to presentations of drug-related stimuli (i.e., drug cues ). [1] [2] The central tenet of cue reactivity is that cues previously predicting receipt of drug reward under certain ...