| Abrupt onset |
| History of a precipitating event, usually physical injury or illness |
| Fast progression to maximum symptom severity and disability |
| Movement abnormality that is incongruent with known disease |
| Variability in movement characteristics (eg, amplitude, frequency, or distribution) |
| Variability in the movement symptom over time (eg, during history, examination, waiting room) |
| Waxing and waning symptoms over time (ie, "good and bad" days) |
| Normalized movement disorder with distraction |
| Worsened movement disorder with attention (eg, during observation or examination) |
| Entrainment of movement (eg, tremor) to the frequency of repetitive movements |
| Presence of comorbid pain, fatigue, and cognitive symptoms |
| Presence of comorbid neurologic disease |
| Functional disability out of proportion to examination findings |
