Which of the following statement is TRUE about REM sleep?

Normal sleep involves two states: REM sleep and non-REM sleep. REM sleep is often associated with dreaming. Non-REM sleep is a period of decreased physiologic and psychological activity and is fuher divided into stages 1, 2, 3, and 4 on the basis of visually scored EEG patterns.REM sleep is characterized by high-frequency; low-amplitude EEG and loss of muscle tone in the major antigravity muscles. REM sleep is a distinct state of sleep characterized by wake-pattern EEG, skeletal muscle paralysis, and rapid, conjugate eye movements. Ref: Clark C.P., Moore P.J., Gillin J.C. (2008). Chapter 27. Sleep Disorders. In M.H. Ebe, P.T. Loosen, B. Nurcombe, J.F. Leckman (Eds), CURRENT Diagnosis & Treatment: Psychiatry, 2e.