Biological explanation of anorexia essay

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Biological explanation of anorexia essay

Get Full Essay Get access to this section to get all help you need with your essay and educational issues. N; evolutionary, genetic and neurobiological. The evolutionary explanation focuses on the adapted to flee hypothesis.

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Guisinger 03 suggested that Anorexia served an adaptive purpose in the environment of evolutionary adaption. He explains that levels of restlessness, traits that characterise anorexia, would have been adaptive during times in which food supplies were exhausted, as hunter-gatherers had to find new sources of food.

Therefore high levels of activity and denial of hunger would have promoted migration in response to famine. This would promote survival of the collective group, which would provide more safety for its individual members and so the trait would be passed onto further generations.

The Genetic explanation of Anorexia Nervosa suggests that anorexia is genetically transmitted through generations. Based upon research into the topic it appears that individuals that have a relative with anorexia have an increased risk of developing the disorder themselves, which would suggest that anorexia is not directly inherited as many physical attributes are but that a predisposition to Anorexia is inherited.

The use of twin studies allows researches to establish the relative contribution of genetics and environmental factors, as MZ twins are genetically identical while DZ twins are only genetically similar.

Given the fact that both twin sets share an environment it is assumed to mean that this is controlled with any differences in proneness to Anorexia Nervosa being attributed to genetics.

Lastly, the Neurobiological hypotheses, developed more recently suggests that abnormalities in CNS serotonin function may play a role in the development and persistence of the anorexia nervosa. Studies of long-term weight-recovered patients have revealed increased serotonin activity, such as elevated levels of serotonin metabolite 5-hydroxyindoleactic acid in the CFS and reduced binding potential of receptors, suggestive of higher levels of circulating CNS serotonin, in several brain regions metabolites are by-products of metabolism that can be assessed infer neurotransmitter activity.

Due to the fact the evolutionary explanation is speculative there is a complete lack of evidence to support it; it is near impossible to prove. It could be argued that if this trait were still an adaptive advantage and it was the sole explanation for anorexia then everyone should develop anorexia.

As it stands, anorexia is not a hugely common disease. In addition, rates of anorexia have increased. The most substantial increase was among females aged years, for whom a significant increase was observed from to Due to the fact the evolutionary explanation of Anorexia cannot be supported by research this explanation therefore has no practical applications.

Even if it could be proved, this explanation is revolved around evolution, a process over which humans can exert no real control. Therefore, there would be no obvious steps that could be taken to try and prevent these anorexic traits from being passed on.

Discuss Biological Explanations of Anorexia Nervosa | Essay Example

Research into genetics and neurobiology are conventionally scientific as research is replicable and investigates working hypotheses with quantitative data. This can be contrasted with the evolutionary explanation, as this cannot provide research, which therefore cannot be replicated, and the hypothesis cannot be falsified.

Biological explanation of anorexia essay

However it should be considered that anorexia is clearly a complex disease that does not readily lend itself to investigations, which yield quantitative data. There are studies to support the genetic explanation of anorexia nervosa.

Holland et al offers strong support for the idea that a person may have a genetic predisposition for anorexia. This demonstrated a dramatic increase in the chances of getting anorexia in twins with a higher percentage of shared genes.

Yet, there are a number of problems with such research. Both MZ and DZ twins share experiences as well as genes so similarities, such as both having anorexia, are not necessarily exclusively genetic.

Taking this idea further, MZ twins are likely to be treated more similarly than DZ twins due to their appearance. Therefore this could lead to results that are distorted due to self-fulfilling prophecy as MZ twins would live up to the expectation placed upon both of them.

It is not just the genetic explanation of anorexia that takes a narrow explanatory focus. All three biological explanations focus solely on one casual factor and consequently overlook other potential important factors, which ultimately leads to an oversimplified account of anorexia.

There is evidence to support the fact that there are other important factors involved with anorexia.Essay about Biological Explanation of Anorexia The biological explanation for Anorexia Nervosa focuses on the role of neurotransmitters.

It suggests disturbances in the levels of serotonin and dopamines are characteristic of anorexia. Hypochondria is the interpretation of bodily symptoms as signs of a serious illness. Frequently the symptoms are normal bodily functions, such as coughing, pain, sores, or sweating.

Although some people will be aware that their concerns are excessive, many become preoccupied by the symptoms. The biological explanation for Anorexia Nervosa focuses on the role of neurotransmitters. It suggests disturbances in the levels of serotonin and dopamines are characteristic of anorexia.

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Bailer et al compared serotonin activity in women recovering from restricting anorexia with those recovering from purging type anorexia with a healthy control group. Specification link: You will be able to outline and evaluate: Biological, including neural and evolutionary, explanations of anorexia nervosa Psychology explanations of anorexia nervosa Outline and description of theories | Research evidence and commentary | IntroductionThe DSM-IV Rev identifies three categories of eating disorder: * Anorexia nervosa 1.

The biological explanation for Anorexia Nervosa focuses on the role of neurotransmitters. It suggests disturbances in the levels of serotonin and dopamines are characteristic of anorexia. 1. Discuss one or more biological explanations of eating disorders 8 marks 16 marks The biological approach would suggest that anorexia nervosa AN has a.

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