Parasomnias can be thought of as incomplete transition from one state to another; they are classified according to whether they occur in REM sleep or non-REM sleep as REM sleep parasomnias, and non-REM sleep parasomnias.
Parasomnias can be thought of as incomplete transition from one state to another; they are classified according to whether they occur in REM sleep or non-REM sleep as REM sleep parasomnias, and non-REM sleep parasomnias.