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. 2013 Sep 13;3(9):e003098. doi: 10.1136/bmjopen-2013-003098

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Occurrence of ‘α blinks’. These bursts are a startle reaction to the tone (conditioned stimulus) and are less frequent in patients with multiple system atrophy and progressive supranuclear palsy (PSP) than in the control and idiopathic Parkinson's disease (IPD) groups. Data for patients with IPD and PSP were taken from our earlier studies using identical methods.¹² ¹⁴ Data are indicated as average value and single SD and were pooled for both paradigms.