Sirkadiyen Ritim Uyku Uyanıklık Bozuklukları
Özet
Sirkadiyen ritim uyku uyanıklık bozuklukları (SRUB), vücudun içsel sirkadiyen saati ile dış çevre ve sosyal yaşam arasındaki uyumsuzluktan kaynaklanan, kronik veya tekrarlayan uyku sorunlarıdır. Bu durum bireylerde uykusuzluk, gündüz aşırı uykululuk ve sosyal, akademik ya da mesleki alanlarda belirgin işlevsellik kayıplarına yol açmaktadır. En temel sirkadiyen ritim belirleyicisi uyku-uyanıklık döngüsü olup, bu ritimler başta ışık olmak üzere fiziksel aktivite ve melatonin gibi faktörlerle 24 saatlik güne senkronize edilir. Bozukluklar, altta yatan mekanizmalarına göre endojen sirkadiyen saatin değiştiği gecikmiş, erken, serbest (24 saatlik olmayan) ve düzensiz uyku-uyanıklık fazı bozuklukları ile dış koşulların değiştiği jet lag ve vardiyalı çalışma tipi uyku bozuklukları şeklinde kategorize edilir. Tanı için en az üç ay süren belirtilerin ayrıntılı anamnezi, uyku günlükleri ve aktigrafi kayıtları esastır. SRUB'nin yönetimi yalnızca uyku kalitesini artırmayı değil, çoklu organ sistemlerinin işlevini korumayı da amaçlayan çok modlu bir yaklaşım gerektirir. Sedatif-hipnotik ilaçlar bu rahatsızlıklarda kalıcı çözüm sağlamadığı ve hastalığı kronikleştirebildiği için temel tedavi yöntemleri olarak uyku hijyeninin sağlanması, zamanlanmış parlak ışık uygulaması, kronoterapi ve zamanlı melatonin kullanımı gibi psikofarmakolojik ve davranışsal yaklaşımlar tercih edilmektedir.
Circadian rhythm sleep-wake disorders (CRSD) are chronic or recurrent sleep issues resulting from a mismatch between the body's internal circadian clock and the external environment or social demands. This condition leads to insomnia, excessive daytime sleepiness, and significant functional impairment in social, academic, or occupational areas. The most fundamental circadian rhythm determinant is the sleep-wake cycle, which is synchronized to the 24-hour day by factors such as light, physical activity, and melatonin. Based on their underlying mechanisms, disorders are categorized into situations where the endogenous clock itself is altered—such as delayed, advanced, free-running (non-24-hour), and irregular sleep-wake phase disorders—and situations where external conditions change, including jet lag and shift work sleep disorder. Diagnosis relies primarily on a detailed history of symptoms lasting at least three months, sleep diaries, and actigraphy recordings. Management of CRSD requires a multimodal approach aimed not only at improving sleep quality but also at protecting the functions of multiple organ systems. Since sedative-hypnotics do not provide a permanent solution and can cronify the disease, core treatment modalities prefer behavioral and psychopharmacological approaches, including establishing sleep hygiene, timed bright light therapy, chronotherapy, and timed melatonin administration.
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