Anth106 week6 addiction and reward kraushaar lecture

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Unformatted text preview: ANTH106 ANTH106 Reward & Addiction Ms Niree Kraushaar Department of Psychology, Macquarie University [email protected] • • • • • Recap last week Drugs of abuse Reward Theories of Addiction Long­term effects of Stimulants From Last Week @From Last Week Lecture Outline @Lecture Outline • Drugs are substances introduced to the body that change regular functioning. • The effect of the drug is modulated by o Absorption o Distribution o Metabolism o Excretion • Most drugs increase or decrease communication within the brain. • Brain communicates via a process of neurotransmission • Co­ordinate brain function • Consist of 4 main parts: o Cell body – houses nucleus o Dendrites – point out like tree branches o Axon – one only and sends information for the cell o Pre­synaptic Terminals – Lots of branches with swells at base of axon. Contains neurotransmitters Neurons @Neurons • Axon + Dendrites = Neurites Neurotransmitters Revised Neurotransmitters Revised Neurotransmission Revision @Neurotransmission Revision 1. Action potential triggers release of neurotransmitter from presynaptic terminal 5. NT transported back up into presynaptic cell OR metabolised in synapse 2. NT binds to receptor on post synaptic cell 4. NT released from receptor 3. Bound NT causes a More From Last Week change in post-synaptic More From Last Week dendrite • Some drugs act as AGONISTS and m...
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