Fig. 3: Associations between MRI measures and motor severity.

Plots show standardized beta-coefficients and confidence intervals for each ROI/modality combination for each mixed linear model. a Associations between MRI-measures in the SN and N1 and motor severity (contralateral UPDRS-III in the ON-medication state), b Associations between the asymmetry of MRI-measures and the asymmetry of motor severity. c Associations between MRI-measures in the substantia nigra and N1 and LED. * Denotes significant association.