Answer to Question 1
Answer: Slow-wave sleep disorders include sleepwalking, bedwetting, and night terrors. Slow-wave sleep is also associated with a form of bedtime overeating.
Answer to Question 2
Answer: Sleep could be the result of depletion of a wakefulness-promoting factor, whereas waking could result from depletion of a sleep-inducing factor. Two objections arise from the observation that conjoined twins (who share a circulatory system) show separate sleep-cycles. More importantly, the hemispheres of the dolphin brain show alternating sleep-waking patterns.