Addictive Behaviours Flashcards
How is addiction defined?
Not having control over using something, to the point where it could be harmful to you
A dependency on a substance
What is the DSM-5?
Diagnose mental disorders
Chapter for substance related and addictive disorders
No behavioural disorders involved ev gaming
What are the six criteria’s to diagnose addiction?
Salience
Mood modification
Tolerance
Withdrawal symptoms
Conflict
Relapse
What is salience
The activity has become the most important thing in the individuals life
It dominates their thoughts
What is mood modification
May use to boost their mood or to relax them
What is tolerance
Individual needs more to achieve the same effect
What are withdrawal symptoms
Physical eg insomnia or nausea
Psychological eg irritability or moodiness
What is conflict
Conflict between themselves, family and friends
May compromise their job or family to engage in addictive behaviour
What is relapse
A strong tendency to return back to that behaviour
What are the two biological explanation of addiction
The role of dopamine
Addiction gene
What is key brain area implicated in addiction
The Mesolimbic pathway
The reward pathway
What does the reward pathway reinforce
Pleasurable feelings
Makes us want to do it again
Eg eating drinking sex
What area of the brain is dopamine released from
Ventral tegmental area
Where is the jolt of pleasure felt in the brain
Nucleus accumbens (NAC)
What links the ventral tegmental area and nucleus accumbens?
The mesolimbic pathway
Where we feel pleasure
What research supports the mesolimbic pathway
Dopamine levels increased when given a gambling task, levels raised if either a win or a loss
Alcohol is seen to increase dopamine levels in the brain
What is tolerance and withdrawal
Where the brain adapts to the drugs: experience to try and reach equilibrium
The drug alters the function of the brain and upsets the balance, the brain will adapt to minimise the effect and restore to normal function.
The brain does this when the drug is present, when it is not, the brain is out of balance and causes symptoms of withdrawal.
Causes people to take the drug again
The effects of the drug are diminished each time, higher and higher dosage is needed
What did volkow find in users if cocaine in tolerance and withdrawal
There was a reduction in both the number of D2 receptions and a reduction in the release of dopamine, as the brain tried to maintain equilibrium from the surge of dopamine they were facing
What part of the brain is responsible for the maintenance of addiction?
Thé frontal cortex
What are the responsibilities of the frontal cortex
Planning
Problem solving
Impulse control
Memory
Judgement
What is the evidence supporting that the frontal cortex is linked in with addiction
Cocaine addicts showed impaired performance in tasks that would use the frontal cortex eg decision making
Research has shown a decrease in D2 receptors and decrease in dopamine release, a tolerance has been built
What is a limitation of the dopamine theory
Not all addictive behaviours increase dopamine levels eg can i as
Dopamine doesn’t perform one function, also helps to avoid unpleasant stimuli or regulates hormone release