“…It should be pointed out that such pathologies are related to chronic pain and, consequently, to the association between this clinical finding, depressive symptoms, and sleep disorders, which alternate as an uninterrupted cycle. 19 So, depression emerges in postmodern society as evidence of man's vulnerability to new rhythms, values, and contexts, materializing latent expiatory suffering through cessation of interest in the modern world, in a mixture of progressive loss of identity by recriminations against themselves and decline in self-esteem. 17,18 This scenario interferes negatively in personal and social productivity, enabling disabilities across the age range, races, faith, gender, socioeconomic status, as well as historical, cultural and geographical boundaries between nations.…”