sleep

Question 1

Two Halves of Sleep

Answer 1

Core sleep: 1st 5 hours - most of deep (stage 3&4), half of REM sleep
Optional sleep : Next 2+ hours, mostly stage 2&1

Question 2

Developmental Changes & Sleep

Answer 2

As age increases - total sleep time decreases
Before 10yrs is mostly reduction in REM
After 10yr is mostly reduction in stage 3&4 sleep

Question 3

Mean Sleep

Answer 3

7.75 hours, circadian rhythm of 25 hours

Question 4

Dreams

Answer 4

Not always during REM, however, 2x as likely to be during REM
If during REM they are 6x longer and more vivid.

Question 5

Insomnia

Answer 5

1/3 of population, usually secondary to another problem
Characteristics: Delayed sleep onset, Disturbed sleep, Early morning waking

Caused by: Psychological (anxiety), Medical (pain), Social factors (alcohol)

Treatment: Hypnotics, Sleep education, behavioural changes in sleep hygiene, relaxing techniques

Question 6

Narcolepsy

Answer 6

0.02-0.05% of population;

Symptoms: Sleep attacks, Cataplexy (paralysis of voluntary muscles) and Vivid onset dreams.

Question 7

Recovery Sleep – ‘Randy’

Answer 7

Regained 24% lost sleep, priority stage 4 and REM sleep recovered.