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2. Biology of depression - Wikipedia

   en.wikipedia.org/wiki/Biology_of_depression

   The biology of depression is the attempt to identify a biochemical origin of depression, as opposed to theories that emphasize psychological or situational causes. [ 1 ] Scientific studies have found that different brain areas show altered activity in humans with major depressive disorder (MDD) . [ 2 ]

3. Neurogenesis hypothesis of depression - Wikipedia

   en.wikipedia.org/wiki/Neurogenesis_hypothesis_of...

   While depression is a complex condition with many factors involved, it is commonly attributed to an imbalance of several key monoamine neurotransmitters, including serotonin, dopamine and norepinephrine. This monoamine hypothesis of depression is popular because of the simplicity of the explanation. [4]

4. Depression and immune function - Wikipedia

   en.wikipedia.org/wiki/Depression_and_immune_function

   [7] [65] Due to this sensitivity and NLPR3's role in triggering cytokine release, NLPR3 is thought to be a key component in sterile inflammatory responses, [7] something which has led to the suggestion that it is a likely mechanism linking non-pathogen induced stress to the increased inflammation that is common in depression and other forms of ...

5. Depression (mood) - Wikipedia

   en.wikipedia.org/wiki/Depression_(mood)

   Researchers theorized that depression was caused by a chemical imbalance in neurotransmitters in the brain, a theory based on observations made in the 1950s of the effects of reserpine and isoniazid in altering monoamine neurotransmitter levels and affecting depressive symptoms. [90]

6. Depression is likely not caused by a chemical imbalance in ...

   www.aol.com/depression-likely-not-caused...

   For years, a chemical imbalance of serotonin has been widely viewed as the culprit for depression, resulting in the widespread use of antidepressants. The study published this week in the journal…

7. Endogenous depression - Wikipedia

   en.wikipedia.org/wiki/Endogenous_depression

   Endogenous depression is an atypical subclass of major depressive disorder (clinical depression). It could be caused by genetic and biological factors. [ 1 ] Endogenous depression occurs due to the presence of an internal (cognitive, biological) stressor instead of an external (social, environmental) stressor. [ 2 ]