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Presentation: Biology of MDD

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  • Presentation: Biology of MDD

The following presentation supports the study of the biological etiologies of Major Depressive Disorder

You are not expected to learn all of the material in this presentation.  When using this study for revision, remember to:

  • Focus on key concepts
  • Learn 2 - 3 studies that you feel you understand.  You may also, instead, learn studies from the textbook or from your teacher.
  • Focus on key evaluation points

 

Evaluation of biological etiologies

Evaluation of biological theories of depression

Strengths

Several studies that support the theories that have been replicated.

Practical application of the theories has led to effective treatments.

Modern biological research takes a more holistic, integrative approach, including the effect of environmental factors (such as ACE's) and mediating cognitive factors.

Limitations

Often dependent on animal models

It is not possible to measure biological factors directly

Much of the research is correlational in nature, not allowing for causation to be determined.

The Treatment Aetiology fallacy - that is, the mistaken notion that the success of a given form of treatment reveals the cause of the disorder

Biological explanations cannot explain the range of symptoms associated with depression (e.g. lower back pain in Chinese patients). There may be cultural and cognitive factors as well.

Some biological explanations can be seen as a reductionist approach to explain a complex human behaviour.

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