Figure 1.

Individual “any” (A) and tonic (B) mentalis EMG activity indices and EMG activity indices for the combination of “any” in mentalis muscle and both anterior tibialis muscles (C) in the isolated RWA subjects at baseline and follow-up. Circles represent individuals. The subject in whom RBD developed is presented as a filled black circle, with dotted line. Horizontal solid lines: SINBAR RBD cutoff-values;⁷ dotted lines 90^th percentile of normative values.⁸ AT, anterior tibialis muscle; EMG, electromyography; SINBAR, Sleep Innsbruck Barcelona group; RBD, rapid eye movement sleep behavior disorder; RWA, rapid eye movement sleep without atonia.