Neural and Hormonal Mechanisms in Aggression Aggression in humans has been associated with low levels of serotonin and high levels of dopamine. Usually‚ serotonin has a calming effect‚ which inhibits aggression. When serotonin levels are low‚ this inhibitory effect is removed and people are less able to control their aggressive behaviour. Evidence for the importance of serotonin comes from two main sources. Brown (1982) found that there were low levels of the waste products of serotonin in the
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Aggression in both animals and humans has been associated with low levels of serotonin and high levels of dopamine. Serotonin appears to stop aggression. So it is harder to stop aggression for those people with low levels of serotonin. David et al suggests that serotonin levels found in criminals are lower than in non-violent criminals. It has also been found that reducing serotonin levels in Vervet monkeys increases their aggressive behaviour‚ and increasing serotonin levels reduces aggressiveness
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DISCUSS THE ROLE OF NEURAL AND HORMONAL MECHANISMS IN HUMAN AGGRESSION Neurotransmitters are chemicals that enable impulses within the brain to be transmitted from one area of the brain to another. Serotonin is thought to reduce aggression by inhibiting responses to emotional stimuli that might otherwise lead to an aggressive response. Low serotonin in the brain has been associated with an increased susceptibility to impulsive behaviour‚ aggression and even violent suicide. A meta-analysis found
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Discuss the neural and/or hormonal mechanisms in aggression (8 marks + 16 marks) Aggression is a behavior directed towards another intended to harm or injure. Neurotransmitters are chemicals that enable impulses in the brain to be transmitted from one area of the brain to another. There’s evidence that the neurotransmitters serotonin and dopamine are closely linked to aggressive behavior. Low levels of serotonin and high levels of dopamine have been associated with aggression in both animals and
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It has been shown that impulsive behavior and aggression have been associated with having low levels of serotonin. Evidence for the role of serotonin comes from the use of drugs that raise levels of serotonin in the brain‚ such as antidepressants. In clinical studies‚ antidepressant drugs which increase serotonin levels also tend to reduce irritability and impulsive aggression. This suggests that increased serotonin levels do lead to reduced aggression. Mann et all gave 35 healthy subjects dexfenfluramine
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The two neurotransmitters that are believed to be the most associated with aggression are low levels of serotonin and high levels of dopamine. These two chemicals allow impulses to be transmitted to another area; therefore all behaviours are influenced by neurotransmitters. There is also the influence of the amygdala‚ which controls the emotional responses‚ the hypothalamus‚ which coordinates both the autonomic nervous system and the activity of the pituitary and the frontal cortex. Normal levels
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Discuss the role of neural mechanisms involved in controlling eating and satiation. 8+16 or 4+8 1. The body is regulated by homeostatic mechanisms; concerning food intake this is dependent on glucose levels. Decrease in glucose levels means hunger levels increase‚ whereas an increase in glucose levels means satiation is reached. 2. Research has revealed two significant eating centres in the hypothalamus; the lateral hypothalamus (LH) and the ventro-medial hypothalamus (VMH). Research from the 1940s
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Attachment‚ commitment‚ intimacy‚ passion‚ grief from separation‚ and jealousy are but a few of the emotionally-loaded terms used by Dianne Santorelli’s article for the educational research to describe that feeling of which love represents. On the contrary‚ Maskowitz and Orgel states in the book‚ General Psychology‚ that love‚ hate‚ fear ‚ and anger are just some of the amazing varieties of feelings which appear to be related to the differential actions of the sympathetic and parasympathetic branches
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Outline and evaluate the role of neural mechanisms in controlling eating behaviour (24 marks) Today there is enormous interest in the psychological factors that can affects a person’s eating habits‚ but some of the clearest research findings have come from research into the brain (neural) mechanisms controlling eating behaviour. One important mechanism to consider is the role of homeostasis in all mammals. Homeostasis is how the body maintains a constant internal environment. Our diet is essential
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Outline and evaluate the role of neural mechanisms in eating behaviour AO1: One way in which eating behaviour is controlled is by a process called homeostasis. This involves mechanisms which both detect the state of the internal environment and also correct the situation to restore that environment to its optimal state. The body has evolved two separate systems‚ one for turning eating on and another for turning it off. Glucose levels play an important role in producing feelings of hunger. When
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