Carlotta is a research assistant in the college sleep lab. As she monitored the EEG recording of a sleeping subject in the lab, she noted the presence of theta brain waves, sleep spindles, and K complexes. Carlotta concludes that the subject is experiencing:
A)REM sleep.
B)stage 4 NREM.
C)a hypnagogic hallucination.
D)stage 2 NREM.

Question

Quizplus · Accepted Answer

The presence of theta brain waves, sleep spindles, and K complexes indicate that the subject is in stage 2 of non-rapid eye movement (NREM) sleep. This stage of sleep is characterized by a decrease in heart rate, breathing rate, and body temperature. Theta waves are slower in frequency than alpha waves but higher than delta waves. Sleep spindles are short bursts of brain activity, while K complexes are large waves that help to protect sleep from being disturbed by external stimuli. REM sleep is characterized by an increase in brain activity and rapid eye movements, and hypnagogic hallucinations occur when falling asleep or waking up.

Carlotta Is a Research Assistant in the College Sleep Lab