Addiction Psychology
- Created by: Fxck_ambz
- Created on: 18-06-17 18:38
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- Biological explanation of addiction 1: Dopamine
- outline the characteristics of addiction
- mesolimbic pathway
- ventricle tegmental area-releases dopamine as a result of addictive substance
- nucleus accumbens - feels the pleasure
- prefrontal cortex- decision making. -
- nucleus accumbens - feels the pleasure
- supporting evidence : Joutsa et al - gambling caused increased dopamine levels
- boileau et al - increased dopamine when drinking alcohol.
- ventricle tegmental area-releases dopamine as a result of addictive substance
- tolerance and withdrawal - over time tolerance to the effects of the drug is experienced as dopamine becomes less sensitive
- Volkow et al 1997
- tolerance and withdrawal - over time tolerance to the effects of the drug is experienced as dopamine becomes less sensitive
- maintaining addiction: the role of the frontal cortex.
- Wang et al - activity increased in the brain when coming into contact with addictive substances or hues associated with it.
- Volkow et al -cocaine addicts had altered brain structures.
- mesolimbic pathway
- evaluation
- not all behaviours increase dopamine levels
- paul stokes et al - no increase when cannabis is smoked. karmen yoder et al - no increase in alcohol consuming.
- complexity of the role of dopamine
- Liberzon et al - NAc responsible in soldiers suffering from PTSD when exposed to battle sounds.
- Vaughn Bell - "Kim Kardashian of Neurotransmitters " it is fashionable to blame dopamine
- methodological issues
- David Nutt et al
- small scale. laboratory. use of animals
- animal studies
- Olds and Milner 1954
- placed an electrode on a rats brain and stimulated everytime they went to a centre of the room
- Olds and Milner 1954
- David Nutt et al
- not all behaviours increase dopamine levels
- Untitled
- varencline
- Untitled
- outline the characteristics of addiction
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