Table 1 ICSD-II criteria for REM sleep behavior disorder

A

Presence of REM sleep without atonia; the EMG finding of excessive amounts of sustained or intermittend elevation of sub-mental EMG tone or excessive phasic submental or (upper or lower) limb EMG twitching.

B

At least one of the following is present:

   I. Sleep related injurious, or disruptive behaviors by history

   II. Abnormal REM sleep behaviors documented during PSG monitoring

C

Absence of EEG epileptiform activity during REM sleep unless RBD can be clearly distinguished from any concurrent REM sleep-related seizure disorder.

D

The sleep disturbance is not better explained by any other sleep disorder, medical or neurological disorders, mental disorders, medication use, or substance abuse