What triggers the delayed phase preference?
Through mechanisms not yet well understood, these changes in the adolescent physiology trigger the so-called phase delay: the tendency of the body to delay its biological rhythms, including sleeping and waking times. It is already known that excessive sleepiness impairs concentration and learning capacity.
How does the term phase delay explain why many adolescents are sleep in the morning?
The natural shift in a teen’s circadian rhythms is called “sleep phase delay.” The need to sleep is delayed for about two hours. Because most teens have to wake up early for school, it is important for them to go to bed on time. If they go to bed late, they will be unable to get the sleep that they need.
What is growth spurt adolescence?
Adolescent growth spurt is the fast and intense increase in the rate of growth in height and weight that occurs during the adolescent stage of the human life cycle. This growth practically occurs in all of the long bones and most other skeletal elements.
What is the secular trend in puberty?
The secular trend in development is the fact that puberty is starting earlier for boys and girls now than it did a hundred years ago. The end of puberty (when girls get their period, for example) has leveled off somewhat, but the beginning of puberty is still getting earlier, especially for girls.
What is delayed sleep phase?
Delayed sleep phase — officially known as delayed sleep-wake phase sleep disorder — is an internal sleep clock (circadian rhythm) sleep disorder in which your sleep pattern is delayed two hours or more from a conventional sleep pattern, causing you to go to sleep later and wake up later.
Why does my 10 year old keep waking up at night?
There are other reasons why your child might wake up at night. These include illness, being too hot or cold, hunger, nightmares, and night terrors. These tend to get better with time and don’t last. To learn how to deal with this see Nightmares and Sleep Terrors.
What does a late growth spurt mean?
Teens who have constitutional growth delay grow at a normal rate when they’re younger, but they lag behind and don’t start their pubertal development and their growth spurt until after most of their peers. People who have constitutional growth delay are often referred to as “late bloomers.”
What are some factors that can affect the timing of puberty?
What factors influence the timing of puberty? Heredity, nutrition, exercise, physical health, emotional quality of family experiences.
Who is most likely to experience puberty first?
According to the National Institutes of Health, puberty usually begins in girls between 8 and 13 years of age, and in boys between 9 and 14 years of age. Puberty is considered to be early in boys before age 8 and girls before 9 years old.
Is Delayed Sleep Phase Syndrome Real?
Delayed sleep phase syndrome (DSPS) is a disorder in which a person’s sleep is delayed by two hours or more beyond what is considered an acceptable or conventional bedtime. The delayed sleep then causes difficulty in being able to wake up at the desired time.
What causes delayed sleep?
Delayed sleep-wake phase disorder (DSWPD) may be caused by a normal shift that occurs in one’s internal clock during puberty. Going to bed earlier or later on successive nights until the desired bedtime is reached is one of several treatment options.