Alexander Unger

May 25, 2023 | frontiersin.org | Minnan Normal |Marco Fabbri |David Vogel |Alexander Unger

1. IntroductionMajor depression is a serious and common psychopathological disorder that has severe affective, cognitive, and behavioral consequences. According to the World Health Organization (1), more than 300 million individuals have depression worldwide; depression represents the fourth highest disease burden and is the leading cause of functional disability, affecting families and society. At present, the etiology of depression is not clear.