title: [Changes of sleep quality and mood disorders under the influence of phototherapy in patients with seasonal affective disorders SAD].
abstract: Major depression, seasonal pattern (seasonal affective disorder SAD) characterize the winter recurrence depressive episodes with remission of symptoms in spring and summer. Patients with winter depression report hypersomnia, fatigue, loss of energy, carbohydrate craving, appetite and weight gain.
  
  
  OBJECTIVE
  The aim of this study was to assess the effect of phototherapy on the quality of sleep parameters and subjective estimation of mood disorders in patients with seasonal affective disorders.
  
  
  METHODS
  The investigated group consisted of 17 patients with SAD (15 female, 2 male) aged 18-64 (mean 38+/-12) years. Phototherapy (bright light therapy) was applied for 14 days, everyday morning--30 minutes, between 6.00 to 10.00--exposition to light of about 10,000 lux intensity. Polysomnogram (sleep EEG) was recorded before and after treatment.
  
  
  RESULTS
  After phototherapy patients reported a significant mood improvement (57%) measured by the Seasonal Pattern Assessment Questionnaire. Sleep investigation showed: increased sleep efficiency, decreased sleep latency, decreased slow wave sleep latency and increased of sleep spindles in the first hour of sleep.
  
  
  CONCLUSIONS
  Research confirms that phototherapy is an effective method of treatment of choice for patients with SAD. The result indicates that phototherapy markedly improved mood and sleep quality.
authors.affiliation: Zakładu Fizjologii AM w Bydgoszczy.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Ciesielczyk
authors.forename: Daria
authors.initials: D
authors.lastname: Pracka
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Pracki
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Tafil-Klawe
authors.forename: Marzena
authors.initials: M
authors.lastname: Ziółkowska-Kochan
mesh_terms: D000328:Adult; D003863:Depression / Q000523:psychology / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010789:Phototherapy / Q000379:methods; D017286:Polysomnography; D016574:Seasonal Affective Disorder / Q000523:psychology / Q000628:therapy*; D012720:Severity of Illness Index; D007319:Sleep Initiation and Maintenance Disorders / Q000523:psychology / Q000628:therapy*; D011795:Surveys and Questionnaires; D013997:Time Factors; D016896:Treatment Outcome