期刊
BRAIN & DEVELOPMENT
卷 33, 期 3, 页码 252-259出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.braindev.2010.09.006
关键词
Melatonin; Serotonin; Circadian singularity; Social jet lag
资金
- Ministry of Health, Labour, and Welfare of Japan [19231001]
Recent surveys in Japan reported that more than half of children interviewed complained of daytime sleepiness, approximately one quarter reported insomnia, and some complained of both nocturnal insomnia and daytime sleepiness. To explain the pathophysiology of this type of sleep disturbance, a novel clinical concept of asynchronization has been proposed. Asynchronization involves disturbances in various aspects of biological rhythms that normally exhibit circadian oscillations. The putative major triggers for asynchronization include a combination of nighttime light exposure, which can disturb the biological clock and decrease melatonin secretion, and a lack of morning light exposure, which can prohibit normal synchronization of the biological clock to a 24-h cycle and decrease activity in the serotonergic system. The early phase of asynchronization may be caused by inadequate sleep hygiene, is likely to be functional, and to be relatively easily resolved by establishing a regular sleep wakefulness cycle. However, without adequate intervention, these disturbances may gradually worsen, resulting into the chronic phase. No single symptom appears to be specific for the clinical phases, and the chronic phase is defined in terms of the response to interventions. The factors causing the transition from the early to chronic phase of asynchronization and those producing the difficulties of recovering patients with the chronic phase of asynchronization are currently unclear. (C) 2010 The Japanese Society of Child Neurology. Published by Elsevier B.V. All rights reserved.
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