Psychological dependence

Addiction and dependence glossary[1][2][3]
  • addiction – a biopsychosocial disorder characterized by persistent use of drugs (including alcohol) despite substantial harm and adverse consequences
  • addictive drug – psychoactive substances that with repeated use are associated with significantly higher rates of substance use disorders, due in large part to the drug's effect on brain reward systems
  • dependence – an adaptive state associated with a withdrawal syndrome upon cessation of repeated exposure to a stimulus (e.g., drug intake)
  • drug sensitization or reverse tolerance – the escalating effect of a drug resulting from repeated administration at a given dose
  • drug withdrawal – symptoms that occur upon cessation of repeated drug use
  • physical dependence – dependence that involves persistent physical–somatic withdrawal symptoms (e.g., delirium tremens and nausea)
  • psychological dependence – dependence that is characterised by emotional-motivational withdrawal symptoms (e.g., anhedonia and anxiety) that affect cognitive functioning.
  • reinforcing stimuli – stimuli that increase the probability of repeating behaviors paired with them
  • rewarding stimuli – stimuli that the brain interprets as intrinsically positive and desirable or as something to approach
  • sensitization – an amplified response to a stimulus resulting from repeated exposure to it
  • substance use disorder – a condition in which the use of substances leads to clinically and functionally significant impairment or distress
  • tolerance – the diminishing effect of a drug resulting from repeated administration at a given dose

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, requiring ongoing engagement to prevent the onset of an unpleasant withdrawal syndrome driven by negative reinforcement.[5][6] Neuronal counter-adaptation is believed to contribute to the generation of withdrawal symptoms through changes in neurotransmitter activity or altered receptor expression.[5][6][7] Environmental enrichment and physical activity have been shown to attenuate withdrawal symptoms.[6]

  1. ^ Cite error: The named reference Addiction glossary was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Cellular basis was invoked but never defined (see the help page).
  3. ^ Volkow ND, Koob GF, McLellan AT (January 2016). "Neurobiologic Advances from the Brain Disease Model of Addiction". New England Journal of Medicine. 374 (4): 363–371. doi:10.1056/NEJMra1511480. PMC 6135257. PMID 26816013. Substance-use disorder: A diagnostic term in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) referring to recurrent use of alcohol or other drugs that causes clinically and functionally significant impairment, such as health problems, disability, and failure to meet major responsibilities at work, school, or home. Depending on the level of severity, this disorder is classified as mild, moderate, or severe.
    Addiction: A term used to indicate the most severe, chronic stage of substance-use disorder, in which there is a substantial loss of self-control, as indicated by compulsive drug taking despite the desire to stop taking the drug. In the DSM-5, the term addiction is synonymous with the classification of severe substance-use disorder.
  4. ^ Malenka RC, Nestler EJ, Hyman SE, Holtzman DM (2015). "Chapter 16: Reinforcement and Addictive Disorders". Molecular Neuropharmacology: A Foundation for Clinical Neuroscience (3rd ed.). New York: McGraw-Hill Medical. ISBN 9780071827706. Dependence is defined as an adaptive state that develops in response to repeated drug administration, and is unmasked during withdrawal, which occurs when drug taking stops. Dependence resulting from long-term drug use may have both a somatic component, manifested by physical symptoms, and an emotional–motivational component, manifested by dysphoria and anhedonic symptoms, that occur when a drug is discontinued. While physical dependence and withdrawal occur dramatically with some drugs of abuse (opiates, ethanol), these phenomena are not useful in the diagnosis of an addiction because they do not occur as robustly with other drugs of abuse (cocaine, amphetamine) and can occur with many drugs that are not abused (propranolol, clonidine). The official diagnosis of drug addiction by the Diagnostic and Statistical Manual of Mental Disorders (2013), which uses the term substance use disorder, is flawed. Criteria used to make the diagnosis of substance use disorders include tolerance and somatic dependence/withdrawal, even though these processes are not integral to addiction as noted. ...
    As previously discussed, cessation of cocaine use and the use of other psychostimulants in dependent individuals does not produce a physical withdrawal syndrome but may produce dysphoria, anhedonia, and an intense desire to reinitiate drug use. ...
    Long-term caffeine use can lead to mild physical dependence.
  5. ^ a b Nestler EJ (2013). "Cellular basis of memory for addiction". Dialogues in Clinical Neuroscience. 15 (4): 431–443. doi:10.31887/DCNS.2013.15.4/enestler. PMC 3898681. PMID 24459410. Stimulant and opiate drugs of abuse activate CREB in several brain regions important for addiction, including prominently in the NAc. ...
    Drug activation of CREB in NAc has been shown to represent a classic negative feedback mechanism, whereby CREB serves to reduce an animal's sensitivity to the rewarding effects of these drugs (tolerance) and to mediate a negative emotional state during drug withdrawal (dependence). These effects have been shown recently to drive increased drug self-administration and relapse, presumably through a process of negative reinforcement.
  6. ^ a b c Cite error: The named reference Natural and drug addictions was invoked but never defined (see the help page).
  7. ^ Koob, George F.; Le Moal, Michel (2008). "Addiction and the brain antireward system". Annual Review of Psychology. 59: 29–53. doi:10.1146/annurev.psych.59.103006.093548. ISSN 0066-4308. PMID 18154498.

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