Sleep Across Life

Question 1

Age-related Changes

(3)

Answer 1

• total amount of sleep gradually decreases
• proportion of REM sleep decreases from 50% to 20% within first 2 years and then stays stable
• decrease in proportion of NREM sleep

Question 2

Infants

(3)

Answer 2

• around 12-16 hours
• 50% REM sleep
• sleep onset initally enters in REM sleep

Question 3

Adolescents

(3)

Answer 3

• around 8-10 hours
• 20% REM to 80% NREM
• tendency to have delayed sleep-wake cycle

Question 4

Elderly

(4)

Answer 4

• around 6 hours
• stages are shorter; barely any NREM3 or REM
• frequent awakenings
• tendency to have advanced sleep-wake cycle