Plan for exam question. Models of addiction

"No single model of addiction can explain all aspects of addictive behaviour"

Plan

Biological Model

Disease models

• Genetics may play a role in addictive behaviour.
• Multiple genes probably involved
• Dopamine levels rise cigarette
• Other addiction e.g. cannabis links to gene in different brain system
• Most genetic vulnerability research has been done into alcohol addiction 
• Many family studies show high rates amongst relatives of a alcohol misuser. Although other studies show similar results impossible to separate environmental and genetic factors 
• Personality factors (psychological) and the way different addictive substances are metabolised in the brain (biochemical) would be nessary to observe the effect of on addiciton. 
• The trigger to start an addictive behaviour is likely to come from environmental factors.

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