R.E.M. Behavior Disorder (RBD) is a common issue in Parkinson disease (PD), affecting at least 40% of patients (1), and may occur at any time in disease, though most commonly seen years before motor signs of tremor, stiffness (rigidity), or slowness (bradykinesia). A part of the three highly prognostic non-motor symptoms of PD – symptoms … Continue reading R.E.M. Behavior Disorder