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Sleep Stages
Throughout sleep, there are different stages characterized by the presence or absence of types of brain waves. Typically, we cycle through these stages 4-5 times a night, sleeping on average 7-8 hours. These stages are broken down into two categories:
- Non-REM
- REM

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Learn After
Analysis of human sleep
Stages of human sleep
Rapid Eye Movement (REM) Sleep
Identifying Sleep Stages from Observations
A person is awakened by their alarm clock and reports having been in the middle of a very vivid, bizarre dream. For a brief moment after waking, they feel unable to move their arms or legs. Which of the following best explains the physiological state they were likely in just before waking?
Learn After
Analysis of human sleep
Stages of human sleep
Rapid Eye Movement (REM) Sleep
Identifying Sleep Stages from Observations
A person is awakened by their alarm clock and reports having been in the middle of a very vivid, bizarre dream. For a brief moment after waking, they feel unable to move their arms or legs. Which of the following best explains the physiological state they were likely in just before waking?