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- Q7625015 subject Q7703775.
- Q7625015 abstract "Addiction is a state characterized by compulsive engagement in rewarding stimuli, despite adverse consequences. The process of developing an addiction occurs through instrumental learning, which is otherwise known as operant conditioning.In humans, addiction is diagnosed according to diagnostic models such as the Diagnostic and Statistical Manual of Mental Disorders, through observed behaviors. There has been significant advancement in understanding the structural changes that occur in parts of the brain involved in the reward pathway (mesolimbic system) that underlies addiction. Most research has focused on two portions of the brain: the ventral tegmental area, (VTA) and the nucleus accumbens (NAc).The VTA is the portion of the mesolimbic system responsible for spreading dopamine to the whole system. The VTA is stimulated by ″rewarding experiences″. The release of dopamine by the VTA induces pleasure, thus reinforcing behaviors that lead to the reward. Drugs of abuse increase the VTA’s ability to project dopamine to the rest of the reward circuit. These structural changes only last 7–10 days, however, indicating that the VTA cannot be the only part of the brain that is affected by drug use, and changed during the development of addiction.The nucleus accumbens (NAc) plays an essential part in the formation of addiction. Almost every drug with addictive potential induces the release of dopamine into the NAc. In contrast to the VTA, the NAc shows long-term structural changes. Drugs of abuse weaken the connections within the NAc after habitual use, as well as after use then withdrawal.".
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- Q7625015 wikiPageWikiLink Q4044974.
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- Q7625015 wikiPageWikiLink Q640562.
- Q7625015 wikiPageWikiLink Q7703775.
- Q7625015 wikiPageWikiLink Q828130.
- Q7625015 wikiPageWikiLink Q847079.
- Q7625015 wikiPageWikiLink Q910028.
- Q7625015 comment "Addiction is a state characterized by compulsive engagement in rewarding stimuli, despite adverse consequences. The process of developing an addiction occurs through instrumental learning, which is otherwise known as operant conditioning.In humans, addiction is diagnosed according to diagnostic models such as the Diagnostic and Statistical Manual of Mental Disorders, through observed behaviors.".
- Q7625015 label "Addiction-related structural neuroplasticity".