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Related Experiment Videos

Daily activity and persistent sleep-wake schedule disorders.

T Ohta1, T Iwata, Y Kayukawa

  • 1Department of Psychiatry, Nagoya University School of Medicine, Japan.

Progress in Neuro-Psychopharmacology & Biological Psychiatry
|July 1, 1992
PubMed
Summary
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Chronotherapy effectively resets circadian rhythms in Delayed Sleep Phase Syndrome (DSPS) and Non-24-hour Sleep-Wake Syndrome (HNS). Vitamin B12 and Triazolam aided rhythm maintenance, particularly in adolescents.

Area of Science:

  • Sleep Medicine
  • Chronobiology
  • Circadian Rhythm Disorders

Background:

  • Disorders of entrainment, including Delayed Sleep Phase Syndrome (DSPS) and Non-24-hour Sleep-Wake Syndrome (HNS), disrupt the body's natural sleep-wake cycle.
  • These conditions significantly impact daily functioning, leading to difficulties such as inability to attend school.

Purpose of the Study:

  • To evaluate the efficacy of non-pharmacological and pharmacological interventions for treating circadian rhythm disorders like DSPS and HNS.
  • To assess the effectiveness of chronotherapy and adjunctive treatments in resetting and maintaining circadian rhythms.

Main Methods:

  • Patients diagnosed with DSPS and HNS received a combination of non-pharmacological treatments and pharmacological agents.
  • Chronotherapy was employed to reset the circadian clock, with specific medications like Triazolam and Vitamin B12 (methylcobalamin) used as needed.

Related Experiment Videos

  • Treatment outcomes were assessed, focusing on rhythm resetting, maintenance, and functional improvements, particularly in adolescent patients.

    • Main Results:

    • Chronotherapy successfully reset circadian rhythms in all DSPS patients, although maintaining the rhythm required additional support.
    • Triazolam proved effective in managing recurring phase delays post-chronotherapy.
    • A notable subset of patients with DSPS or HNS showed significant improvement with Vitamin B12 (methylcobalamin) treatment.
    • Adolescent patients experiencing school attendance issues due to their condition successfully returned to classes, with easier rhythm maintenance observed compared to adults.

    Conclusions:

    • Chronotherapy is a viable strategy for resetting circadian rhythms in DSPS and HNS.
    • Adjunctive therapies, including Triazolam and Vitamin B12, play a crucial role in maintaining rhythm stability and improving patient outcomes.
    • Interventions are effective in restoring daily functioning, especially for adolescents, highlighting the importance of timely and appropriate treatment for circadian rhythm disorders.