However, over time, the cause of depression has evolved to include psychological, psychosocial, hereditary, evolutionary and biological factors. Psychological treatments focus on the personality, interpersonal communication and learning (eg counselling, psychotherapy), whereas biological theories focus on explaining that the depletion of particular chemicals (neurotransmitters); serotonin, norepinephrine and dopamine, are the main cause of depression and focus on treatment with antidepressant medications…
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