 Primary outcome will involve change from baseline end of run-in period in cortical arousal intensity associated with PLMs for subjects treated with Gen 600 mg QD for 4 weeks. PSG studies will be recorded for 8 hours using standard techniques described by RK. Cortical EEG arousals will be scored using wavelet analysis of C3A2 and C4A1 EEG signals. Arousals scored in NREM sleep will be assigned a score from 0-9. This arousal scaling is entirely subjective. Wavelet analysis will be performed on each of the scaled arousals using wavelet features that correlate with arousal intensity. The arousal intensity will be measured using Wavelet Transform which is superior for analyzing signals such as EEG. 