A2 Addiction mind map
- Created by: mollyb
- Created on: 14-06-13 15:49
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- Biological model
- reward system/ mesocorticolimbic system/ common reward pathway
- humans have a reward system in the brain which is a network of cells which that releases dopamine every time you do a rewarding behaviour
- dopamine is seen as a reward and a behaviour that is rewarded is more like to reoccur
- also seen in gambling and when a person frequently gambles or takes a drug too much dopamine in released for too long
- as an addict becomes used to the drug they no longer feel life rewarding without the drug and this is a huge negative effect
- Small et al
- found eating chocolate also activated the MDP and increased dopamine. Was also activated when someone even thought about chocolate. Drugs also activate the MDP in the same way.
- Ginovart et al
- used PET scanning to count the number of dopamine receptors in the brain of animals given amphetamines and found that the number of D2 receptors decreased as animals created a tolerance
- Overstreet et al
- some rats were more genetically at risk for alcohol addiction than others.
- Van den Bree et al
- found that MZ twins were more likely to be both addicts than non identical twins. this was particularly true for male twins and supports the idea that genetics play a role in addiction
- IDA
- cannot be generalised to humans
- does not include psychological factors, therefore must all be biological however not true
- simplistic and reductionist
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