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In addition, research has found genetic evidence that humans have had a long evolutionary history to plant neurotoxins. Sullivan et al. (2008) [ 12 ] has noted that humans, like other mammals, have 'inherited' the cytochrome P450 system, which functions to detoxify chemicals found in the environment, including plant neurotoxins.
The common biomolecular mechanisms underlying addiction – CREB and ΔFosB – were reviewed by Eric J. Nestler in a 2013 review. [3] Genetics and mental disorders may precipitate the severity of a drug addiction. It is estimated that 50% of healthy individuals developing an addiction can trace the cause to genetic factors. [4]
Contemporary research in neurobiology (a branch of science that deals with the anatomy, [9] physiology, and pathology of nervous system) of addiction points to genetics as a major contributing factor to addiction vulnerability. It has been estimated that 40–60% of the vulnerability to developing an addiction is due to genetics.
Current evidence indicates that in both men and women, alcoholism is 50–60% genetically determined, leaving 40-50% for environmental influences. [ 8 ] In a review in 2001, McLellan et al. compared the diagnoses, heritability, etiology (genetic and environmental factors), pathophysiology, and response to treatments (adherence and relapse) of ...
Rat Park was a series of studies into drug addiction conducted in the late 1970s and published between 1978 and 1981 by Canadian psychologist Bruce K. Alexander and his colleagues at Simon Fraser University in British Columbia, Canada.
Another important concern is the lack of evidence supporting the addictive personality label and the possibility of stigma. [2] While there is a medical consensus surrounding the genetic components of addiction, [5] there is no such consensus supporting the idea that specific personality types have a tendency towards addictive behaviors. [2]
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 ...
Addiction can cause physical, emotional and psychological harm to those affected by it. [1] The American Society of Addiction Medicine defines addiction as "a treatable, chronic medical disease involving complex interactions among brain circuits, genetics, the environment, and an individual's life experiences. People with addiction use ...