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Hemis no: 127844 Word Count: 1,962 PS2060B Biological Psychology Discuss the evidence for a dopaminergic system that is involved in reward and drug addiction Most drugs affect the brain and behaviour by changing synaptic transmissions (Rosenzweig 1999). In order to discuss the evidence for a dopaminergic system that is involved in reward and drug addiction, we need to establish the relationship that a dopaminergic system has with drug reward and drug addiction. In essence when we are discussing a dopaminergic system we are making reference to neurotransmitter systems. The intricacies involving the brain, neurochemically have become more prevalent through processes such as immunocytochemistry. Through such processes we are able to locate substances within the nervous system as well as identifying neurotransmitters. Dopamine and seratonin are neurotransmitters, which are integral in relation to drugs whether it is used for drug reward or drug addiction. This essay will focus on such neurotransmitters in order to...

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