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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 1.

Figure 1

Stabilogram from pelvis acceleration traces (lateral versus anteroposterior) during 30s of quiet stance, eyes open, normal stance, from a representative healthy control, untreated patient with early PD, moderate PD patient OFF and ON medication before DBS surgery, and 6 months after bilateral DBS surgery in STN (from left to right). Note that sway area is larger than normal, even in early, untreated PD, and increases with levodopa but decreases with DBS in STN with additive effects of both levodopa and DBS. Stabilograms from center of pressure excursions of a forceplate result in similar metrics of sway in quiet stance (25,27).