Figure 4.
A, B, Relationship between the clinical/subclinical characteristics of spasmodic dysphonia and mean percentage change in [11C]raclopride binding potential during symptomatic speech production (A) and asymptomatic sequential finger tapping (B). Spasmodic dysphonia severity was measured as a number of voice breaks in produced sentences. Delayed initiation time of tapping execution was found in patients compared to controls. The color bar represents the rs values. Correlations are shown in the series of coronal brain images in Talairach–Tournoux standard space.