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The criteria were criticized because they do not take into account any other aspects of the personal and social context in which depression can occur. [37] In addition, some studies found little empirical support for the DSM-IV cut-off criteria, indicating they are a diagnostic convention imposed on a continuum of depressive symptoms of varying ...
One reason depression is thought to be a pathology is that it causes so much psychic pain and distress. However, physical pain is also very distressful, yet it has an evolved function: to inform the organism that it is being damaged, to motivate it to withdraw from the source of damage, and to learn to avoid such damage-causing circumstances in the future.
The biology of depression is the attempt to identify a biochemical origin of depression, as opposed to theories that emphasize psychological or situational causes. Scientific studies have found that different brain areas show altered activity in humans with major depressive disorder (MDD) . [ 1 ]
Rank theory is an evolutionary theory of depression, developed by Anthony Stevens and John Price, and proposes that depression promotes the survival of genes. [1] Depression is an adaptive response to losing status (rank) and losing confidence in the ability to regain it. The adaptive function of the depression is to change behaviour to promote ...
Depression is a significant mental illness with physiological and psychological consequences, including sluggishness, diminished interest and pleasure, and disturbances in sleep and appetite. [1] It is predicted that by the year 2030, depression will be the number one cause of disability in the United States and other high-income countries. [2]
This is seen in that immune activity does not appear to be enough on its own to cause depression. [39] Evidence for this comes primarily from treatments that involve the pro-inflammatory IFN-α, which is commonly used in treating viral infections but only results in major depression in about one third of patients.
Depression can have multiple, sometimes overlapping, origins. Depression can be a symptom of some mood disorders, some of which are also commonly called depression, such as major depressive disorder, bipolar disorder and dysthymia. [7] Additionally, depression can be a normal temporary reaction to life events, such as the loss of a loved one.
Nuclear war is an often-predicted cause of the extinction of humankind. [1]Human extinction or omnicide is the hypothetical end of the human species, either by population decline due to extraneous natural causes, such as an asteroid impact or large-scale volcanism, or via anthropogenic destruction (self-extinction), for example by sub-replacement fertility.
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