The authors defined sleep fragmentation using an index of the number of sleep stage transitions per hour of sleep.

This course applies to: excess use of brain, migraine headache, headache, bad quality sleeping, deaminess and festless sleep, decline of memory, stiff cervical vertebra, aching, weak and numb arms.

Insomnia is a sleep sustained considerable time unsatisfactory quality or quantity of symptoms, difficulty falling asleep, and sleep fitfully and wake up early is the most common symptoms of insomnia.