Abstract
It is widely accepted that mood disorders are related to biological rhythm abnormalities. It has been proved that this happens at least in a significant proportion of patients which profit from chronotherapeutic interventions. Rhythm abnormalities in mood disorders include among others diurnal mood variation, elevated nocturnal body temperature, lower nocturnal TSH, overall increased cortisol secretion, phase advance of cortisol and melatonin secration and sleep architecture abnormalities. The exact relationship of these abnormalities to the etiopathogenesis of depression remains unclear; it is however evident that at least some treatment modalities worsen rhythms, leave residual symptoms and therefore do not lead to full remission, which sould be the ultimate goal of any treatment approach. It seems important for an informed approach and understanding of mood disorders and their treatment to take into consideration the normalization and stabilization of endogenous rhythms.
Highlights
It is widely accepted that mood disorders are related to biological rhythm abnormalities
Rhythm abnormalities in mood disorders include among others diurnal mood variation, elevated nocturnal body temperature, lower nocturnal TSH, overall increased cortisol secretion, phase advance of cortisol and melatonin secration and sleep architecture abnormalities
The exact relationship of these abnormalities to the etiopathogenesis of depression remains unclear; it is evident that at least some treatment modalities worsen rhythms, leave residual symptoms and do not lead to full remission, which sould be the ultimate goal of any treatment approach. It seems important for an informed approach and understanding of mood disorders and their treatment to take into consideration the normalization and stabilization of endogenous rhythms
Summary
It is widely accepted that mood disorders are related to biological rhythm abnormalities. Circadian rhythms: strong evidence on how to approach depression
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