An individual is taking part in a sleep study. He is attached to all of the EEG recording electrodes. Just before the study is to start, he suddenly falls down, is immobilized and goes immediately into sleep. What stage of sleep will be recorded at this point?

Question

Quizplus · Accepted Answer

The sudden onset of sleep described, especially with immediate immobilization (which suggests atonia or muscle paralysis), is characteristic of REM (Rapid Eye Movement) sleep. REM sleep is known for its vivid dreaming and muscle atonia to prevent acting out dreams.

An Individual Is Taking Part in a Sleep Study