PLMS Notes:____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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PLMS Notes:_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Periodic Limb Movement Disorder

Sample PLMS LAT RAT

Sample PLMS

Scoring PLMS Each jerk must be >.5 to 10 seconds in duration Each jerk must represent an 8uV increase in amplitude above resting EMG Must have 4 jerks separated by no less than 5 seconds and no more than 90 seconds

Chin EMG may decrease prior to jerk LOC ROC C3-A2 O1-A2 Chin EMG EKG LAT-RAT EMG Intercostal EMG Airflow Significant only when accompanied by EEG arousal Chin EMG may decrease prior to jerk Jerks may last from .5 to 5 seconds Single PLMS jerk

Calculations Total number of qualifiable events divided by the total hours of sleep (TST)