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The Biological Mechanisms Underlying Major Depressive Disorder,…

- - - - These 3 chemicals can affect depression when they're imbalanced.
      - There's also a genetic link to depression.
      - Stress can also cause depression
        
        Early childhood trauma can increase the likelihood of depression later in life.
        
        The Diathesis-Stress model of depression can provide an explanation between stress and depression.
      - Inflammation
        
        When the body responds to illness, it release a molecule called cytokines.
        
        These molecules can have symptoms that look like depression such as fatigue, lack of interest, and trouble focusing.
- - - - Most promising of the animal models.
    - - The other most promising of the animal models.