Sleep across the lifespan

The hypnogram above shows the sleep of a/an healthy

• infant

• child

• young adult

• very old person

Approximately how old is the person whose hypnogram is shown?

• 0–2 weeks

• 14–19 years

• 30–50 years

• 70 years+

The hypnogram shows that the person experienced

• consolidated sleep.

• mostly light sleep.

• mostly deep sleep.

• a prolonged period of NREM stage 4 sleep.

About how many times did the person awaken after falling asleep?

• 1

• 2

• 12

• 21

The person spent ________ in NREM stage 3 sleep.

• 15 minutes

• 30 minutes

• 1 hour

• no time

Which of the following statements about the sleep of a young healthy adult is correct?

• REM sleep is usually about 75% to 80% of total sleep time.

• Slow wave sleep is rarely experienced.

• REM sleep periods tend to occur closer together during a normal night’s sleep.

• Cyclic alternation of non-REM sleep and REM sleep occurs less frequently than in childhood.

How soon after a healthy young adult falls asleep are they normally likely to experience REM sleep in a typical sleep episode?

• immediately

• about 1–5 minutes

• after the first sleep cycle

• about 80–90 minutes

As a person ages, the total amount of time that they spend asleep each night

• decreases, while the proportion of time spent in REM sleep increases

• decreases, while the proportion of time spent in NREM sleep increases

• increases, while the proportion of time spent in REM sleep also increases

• does not change in relation to the percentage of time spent in REM sleep and NREM sleep

The proportion of rapid eye movement (REM) sleep to non-rapid eye movement (NREM) sleep is

• equal across the lifespan

• greater in infancy than later in the life span

• lower at birth and equal in later adolescence

• lower at birth and higher in late adolescence

What portion of REM sleep do babies get?

• 25%

• 40%

• 50%

• 60%