If an EEG record reveals evidence of sleep spindles, a researcher is likely to conclude that the sleeping person is in which stage of sleep?
A) R
B) N1
C) N2
D) N3

Question

Quizplus · Accepted Answer

Sleep spindles are a characteristic feature of stage N2 sleep, which occurs after the lighter stage N1 sleep. Stage N3, also known as slow-wave sleep, is characterized by a higher amplitude and slower frequency brain waves than N2 sleep. Rapid eye movement (REM) sleep, or stage R, is characterized by a rapid eye movement and more irregular brain wave patterns. Therefore, the presence of sleep spindles would indicate that the person is in stage N2 sleep.

If an EEG Record Reveals Evidence of Sleep Spindles, a Researcher