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. Author manuscript; available in PMC: 2014 Sep 15.
Published in final edited form as: Mov Disord. 2013 Sep 15;28(11):1544–1551. doi: 10.1002/mds.25684

Figure 2.

Figure 2

Anticipatory postural adjustment (APA) as measured from pelvis lateral acceleration in a representative healthy control and patient with early, untreated PD prior to taking a step. APAs are smaller than normal early in progression of PD, are improved with levodopa but worsened by DBS (8). APAs from center of pressure excursion of a forceplate result in similar APA metrics (39).