Figure 1.

Blink reflex recovery cycle with interstimulus intervals of 100, 300 and 600 ms. In patients with multiple system atrophy (MSA), the inhibition of the ipsilateral R2 response to the second stimulus is weaker than in the control group. Data of patients with MSA and controls are indicated as average value and single SD. Data for patients with idiopathic Parkinson's disease and progressive supranuclear palsy (dashed lines) were taken from our earlier studies using identical methods.^{12 14}