Which of the following individuals suggested that adolescence is characterized by unpredictable behavior, defiance of parents, and mood swings brought about by an increase in the sex drive?

A student claims that he has severe insomnia and hardly sleeps at all. The fact that his roommate says that he appears to sleep deeply and is not even bothered by dorm noises when he is asleep suggests that the student's condition is most probably

a. non-REM sleep. b. paradoxical insomnia. c. narcolepsy. d. sleep apnea.

In which stage of sleep do sleep spindles occur?

a. N1 (NREM Stage 1) b. N2 (NREM Stage 2) c. N3 (NREM Stage 3) d. REM