Table 1.
Classification of Clinical Manifestations of Dystonia
| Age at onset |
| Infancy (birth to 2 years) |
| Childhood (3–12 years) |
| Adolescence (13–20 years) |
| Early adulthood (21–40 years) |
| Late adulthood (>40 years) |
| Body distribution |
| Focal (one region of the body) |
| Segmental (two or more contiguous regions) |
| Multifocal (two or more non-contiguous regions) |
| Generalized (trunk plus 2 other regions) |
| Hemidystonia (several sites on one side of the body) |
| Temporal pattern |
| Disease course |
| Static |
| Progressive |
| Variability |
| Persistent |
| Action-specific |
| Diurnal |
| Paroxysmal |
| Associated features |
| Isolated or combined with another movement disorder |
| Occurrence of other neurological or systemic manifestations |