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  • Title: Disturbed circadian core body temperature rhythm and sleep disturbance in school refusal children and adolescents.
    Author: Tomoda A, Miike T, Yonamine K, Adachi K, Shiraishi S.
    Journal: Biol Psychiatry; 1997 Apr 01; 41(7):810-3. PubMed ID: 9084900.
    Abstract:
    We examined the circadian rhythm of core body temperature (CBT) in 22 school refusal patients, ages between 12 and 18 years, who did not have any physical or psychiatric disorders, but had indefinite complaints, and were suspected to have a circadian rhythm disturbance. To obtain normal data for analysis, CBT in 9 healthy age-matched school attendants who did not have any sleep, psychiatric, or medical disturbance were monitored. Circadian variation of CBT in school refusal patients did not present a clear rhythm, and appearance time of their lowest CBT was markedly delayed compared to healthy subjects. Amplitude of circadian CBT changes, fitted to a cosinor curve by the least square method, was significantly smaller in school refusals than in healthy subjects. These findings suggest that in school refusal patients who do not have physical and psychiatric disorders, clinical psychosomatic symptoms (e.g., fatigue and memory disturbance) and school refusal could be closely related to the desynchronization of their biorhythms, particularly the circadian rhythm of body temperature and sleep-wake rhythm.
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