Related Experiment Videos
Seasonal affective disorder
1Department of Psychiatry, University of Helsinki, National Public Health Institute, Finland. timo.partonen@ktl.fi
Lancet (London, England)
|November 5, 1998
Summary
Seasonal affective disorder (SAD) is a mood disorder linked to serotonin transporter gene variations. Morning light therapy is a primary treatment, with antidepressants as a secondary option.
Area of Science:
- Psychiatry
- Neuroscience
Background:
- Seasonal affective disorder (SAD) is a recurrent depressive or bipolar disorder with seasonal patterns.
- Previous hypotheses linked SAD to melatonin metabolism, but evidence is inconclusive.
- Current research focuses on brain serotonin function and genetic predispositions.
Purpose of the Study:
- To investigate the underlying mechanisms and effective treatments for Seasonal Affective Disorder (SAD).
Main Methods:
- Analysis of serotonin transporter gene polymorphisms in SAD patients.
- Review of treatment efficacy for light therapy and antidepressants.
Main Results:
- A higher prevalence of the short-allele polymorphism for serotonin transporter was observed in SAD patients.
- Atypical depressive and somatic symptoms are common presenting complaints.
- Morning artificial light exposure (2500 Ix) is identified as a primary treatment.
Conclusions:
- Serotonin transporter gene variations may play a role in SAD.
- Light therapy is the recommended first-line treatment for SAD.
- Antidepressants are a viable alternative when light therapy is ineffective or not preferred.