Demographic and clinical characteristics of participants
| Spasmodic dysphonia patients | Healthy controls | p value | |
|---|---|---|---|
| Demographic characteristics | |||
| Speech production RAC PET | |||
| Number of participants | 18 | 18 | |
| Age | 54.6 ± 11.0 | 54.6 ± 9.2 | 0.99 |
| Gender | 12 F/6 M | 12 F/6 M | 1.00 |
| Handedness | Right | Right | |
| Spoken language | English | English | |
| Other language experience | None | None | |
| Sequential finger tapping RAC PET | |||
| Number of participants | 15 | 15 | |
| Age | 54.6 ± 9.2 | 54.4 ± 9.5 | 0.97 |
| Gender | 10 F/5 M | 9 F/6 M | 0.72 |
| Clinical characteristics | |||
| Other forms of dystonia | None | None | |
| Number of symptomatic patients | 18 | N/A | |
| Number of patients on botulinum toxin treatment | 17 | N/A | |
| Spasmodic dysphonia duration | 13.3 ± 7.3 | N/A | |
| Spasmodic dysphonia severity (voice breaks per sentence) | 2.4 ± 1.8 | N/A | |
| Number of finger taps | 4245 ± 861 | 4140 ± 966 | 0.37 |
| Accuracy of finger taps (%) | 84.4 ± 11.9 | 86.4 ± 13.7 | 0.34 |
| Initiation of the tapping sequence (reaction time value for mean linear slope coefficient) | 0.2 ± 0.3 | −0.2 ± 0.3 | 0.006 |
F, Female; M, male.