World Association of Sleep Medicine (WASM) 2016 standards for recording and scoring leg movements in polysomnograms developed by a joint task force from the International and the European Restless Legs Syndrome Study Groups (IRLSSG and EURLSSG)
Candidate leg movements (CLM) are all leg movements meeting criteria for periodicity evaluation. CLM with intermovement intervals <10 s interrupt a periodic series. Several non-CLM events, in particular leg movements >10 s end a periodic series. A new criterion was included for morphology of CLM. New criteria define respiratory event associated leg movements.