What term do sleep researchers use to designate the first three stages of sleep?
A)REM sleep
B)non-REM (NREM or N)sleep
C)REMN sleep
D)paradoxical sleep

Name: What term do sleep researchers use to designate the first three stages of sleep? A)REM sleep B)non-REM (NREM or N)sleep C)REMN sleep D)paradoxical sleep
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Sleep researchers use the term non-REM (NREM or N) sleep to designate the first three stages of sleep. REM sleep is the fourth stage. Paradoxical sleep is another name for REM sleep.

What Term Do Sleep Researchers Use to Designate the First