Alertness
Muscle tone
Activity of brain
Summary
Wakefulness
Present
Increased
Active
Mind and body are active, you are alert
NREM
Absent
Reduced
Reduced
Mind and body are relaxed, you are asleep
REM
Absent
Absent
Active
Mind is active, but body is paralyzed, you are asleep
Sometimes, features of one state will transition into another, resulting in behaviors such as walking, talking, panic and eating during sleep. These conditions are collectively known as Parasomnias.
