It's because their brains naturally work on later schedules and aren't ready for bed. Nighttime sleep may be disrupted, with frequent awakenings throughout the night. Lots of us have insomnia trouble falling or staying asleep.
A person with obstructive sleep apnea temporarily stops breathing during sleep because the airway becomes narrowed or blocked. This change in the circadian rhythm seems to be due to the fact that the brain hormone melatonin is produced later at night in teens than it is for kids and adults. August More on this topic for:
Stages 3 and 4 are the most refreshing of the sleep stages — it is this type of sleep that we crave when we are very tired. It's because their brains naturally work on later schedules and aren't ready for bed.
Doctors usually treat narcolepsy with medicines and lifestyle changes. Most teens don't get enough sleep , usually because their schedules are overloaded or they spend too much time texting or chatting with friends until the wee hours of the morning.
The final stage of the sleep cycle is known as REM sleep because of the rapid eye movements that occur during this stage. Rupal Christine Gupta, MD. In the case of PLMD, these movements are involuntary twitches or jerks: