Abstract:Introduction: Several theories regarding the etiology of Major Depressive Disorder (MDD) provoke challenges in defining the exact pathology of the disorder. Among these theories, the most recurring theories were the monoamine hypothesis, cytokine hypothesis, and endocrine factors. Each of these hypotheses are backed with neurobiological studies and provide unique insight on the etiology of MDD. The current state of the literature of MDD is confusing and complex. There are various theories that explain the path… Show more
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