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Behavioural Neuroscience

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Behavioural neuroscience is the study of how the behaviour in humans or animals is controlled by biological systems, such as the brain and the nervous system. Dopamine is a neurotransmitter that shoots nerve impulses through the brain and it is important as it makes sure that the nervous system functions normally. It's role is controlling the brains reward system, plus our sensitivity to rewards and motivation. However levels and responsiveness to dopamine can differ. Higher levels of dopamine can alter a person's emotional trait as it makes them more eager and more likely to go after rewards such as food, money or education. In addition to this it helps regulate the emotions of an individual. Behaviour is explained by how an individual conducts …show more content…
These behaviours have been observed in patients that have Parkinson's disease which is a disease that is a typical example of the loss of dopamine. The impulsive-compulsive behaviours are especially evident when a patient has been diagnosed with Parkinson's disease at a young age. Therefor patients feel an overwhelming drive or urge to act in a certain way, for example patients may become hoarders. Additionally patients may find it difficult to resist certain urges which leads them to become addictive gamblers or have increased abnormal hypersexuality. These behaviours are performed by a person who does not have rational motivation. Additionally, cognitive behavioural symptoms could lead to depression and anxiety, which are induced by insomnia were patients have difficulty sleeping or hypersomnia were patients sleep too much. Dopamine agonist therapies manage and reduce the symptoms of Parkinson's disease, however they can cause impulsive disorders such as gambling behaviours. A study conducted by Cocker, P. J., Tremblay, M., Kaur, S., & Winstanley, C. A. (2017), used male Long Evans rats, which were trained to work a rodent slot machine. The prescription drug ropinirole which is a dopamine agonist drug was administrated to the male rats continuously for 28 days via an osmotic pump. Results showed that the rats performance was increasingly …show more content…
Peeke, P. (2012), investigated the role of dopamine and how it was linked to the addiction of hyperpalatable foods. Hyperpalatable foods are foods that are salty, starchy, sugary and fatty, hence they taste good and encourage the consumer to keep eating . Food corporations create such foods to get consumers to continuously want to buying more of these food products. Peeke, P. (2012), found out that 90 per cent of dopamine neurons in the ventral tegmental area become stimulated when we are about to eat. High levels of dopamine induced patients to become more eager and more motivated to eat because participants associated food as a reward. As a consequence they were likely to eat more hyperpalatable foods than they actually needed because of the boost of satisfaction it gave them. In further experiments, participants were shown showed pictures of their food fixes but were not allowed to have them. Participants expressed that they felt extremely hungry due to this. The subjects dopamine levels were measured, and results showed that the neurotransmitter dopamine rapidly increased through the striatum, concluding that the participants had made a connection between food and obtaining a reward, participants felt a sense of motivation when trying to consume hyperpalatable foods, thus leading them into addictive eating behaviours. Peeke, P. (2012), also concluded that the

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