Use of Harmonic Ratios To Examine the Effect of Cueing Strategies on Gait Stability in Persons With Parkinson's Disease Kristin A. Lowry, PT, MS, Andrew.

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Use of Harmonic Ratios To Examine the Effect of Cueing Strategies on Gait Stability in Persons With Parkinson's Disease Kristin A. Lowry, PT, MS, Andrew J. Carrel, MS, Jessica M. McIlrath, BS, Ann L. Smiley-Oyen, PhD Archives of Physical Medicine and Rehabilitation Volume 91, Issue 4, Pages 632-638 (April 2010) DOI: 10.1016/j.apmr.2009.12.016 Copyright © 2010 American Congress of Rehabilitation Medicine Terms and Conditions

Fig 1 Means and SDs of spatiotemporal variables. The left-side plots are all participants, and the right-side plots are participants separated into HY stage 2 and HY stage 3. (A and B) Normalized velocity, (C and D) normalized stride length, (E and F) normalized cadence, and (G and H) normalized stride time variability. Abbreviations: COG, participants told to think “big” steps; PREF, preferred pace; VER, participants told “big step” while walking; VIS, visual cues; *P<.05. Archives of Physical Medicine and Rehabilitation 2010 91, 632-638DOI: (10.1016/j.apmr.2009.12.016) Copyright © 2010 American Congress of Rehabilitation Medicine Terms and Conditions

Fig 2 Means and SDs of HRs. The left-side plots are all participants, and the right-side plots are participants separated into HY stage 2 and HY stage 3. (A and B) Vertical HR, (C and D) AP HR, and (E and F) mediolateral HR. Abbreviations: ML, mediolateral; V, vertical. *P<.05; †P<.09. Archives of Physical Medicine and Rehabilitation 2010 91, 632-638DOI: (10.1016/j.apmr.2009.12.016) Copyright © 2010 American Congress of Rehabilitation Medicine Terms and Conditions