Question

Recordings of brain wave activity revealed that the participants in the S groups spent the most time in the stage of sleep characterized by sleep spindles. This observation indicates that they were in which stage of sleep?

Answer 1

This observation indicates that they were in the stage 2 NREM of sleep.

Explanation:

• The non-rapid eye movement sleep (NREM sleep) is characterized by high voltage waves at slow speed displayed on the electroencephalographic monitor (EEG).
• The sleepers who experience this stage of sleep are deemed to get healthy sleep.
• Both the heart rate and breathing during this stage of sleep in slow and normal.
• The blood pressure level does not exhibit fluctuation and the sleeper is also still.