Table 1.
Clinical clues in favor of propriospinal myoclonus (PSM), psychogenesis and tics for patients with axial jerks
| Diagnosis | Clinical ‘clues’ | Cohort presence |
|---|---|---|
| PSM | Worsens when lying down | 10 (35) |
| Stimulus sensitive | 7 (18) | |
| Facial musculature involveda | 4 (14) | |
| Psychogenic | Variable muscle pattern | 28 (35) |
| Distractibility | 9 (14) | |
| Psychiatric history | 15 (35) | |
| Multiple somatizations | 14 (21) | |
| Tic | Premonitory sensation | 15 (23) |
| Urge | 2 (12) | |
| Suppression | 12 (26) | |
| Rebound | 2 (10) |
aThe involvement of facial musculature was regarded to exclude the diagnosis of PSM. For all patients, the number per clinical clue present is provided (total number known per clue is listed between brackets)