Advanced sleep phase type is defined as falling asleep and waking earlier than desired. Which option best describes it?

Advanced sleep phase type is defined as falling asleep and waking earlier than desired. Which option best describes it?

• A. Advanced sleep phase type
• B. Delayed sleep phase type
• C. REM sleep
• D. NREM sleep stage 3

Answer: (A)

Circadian rhythm and sleep timing are the focus. Advanced sleep phase type is when the internal clock runs early, causing people to fall asleep and wake well before their desired times. This pattern perfectly matches the description of going to bed earlier and waking earlier than the person wants. The other options don’t fit as well because they aren’t about shifting the timing forward. Delayed sleep phase type is the opposite, with late sleep onset and late wake times. REM sleep and NREM sleep stage 3 refer to specific stages of sleep, not to a pattern of when someone tends to sleep or wake.

Circadian rhythm and sleep timing are the focus. Advanced sleep phase type is when the internal clock runs early, causing people to fall asleep and wake well before their desired times. This pattern perfectly matches the description of going to bed earlier and waking earlier than the person wants.

The other options don’t fit as well because they aren’t about shifting the timing forward. Delayed sleep phase type is the opposite, with late sleep onset and late wake times. REM sleep and NREM sleep stage 3 refer to specific stages of sleep, not to a pattern of when someone tends to sleep or wake.