Bradford C. Bennett, PhD, Mark F

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Presentation transcript:

Center of Mass Movement and Energy Transfer During Walking in Children With Cerebral Palsy Bradford C. Bennett, PhD, Mark F. Abel, MD, Adam Wolovick, BS, Timothy Franklin, BS, Paul E. Allaire, PhD, D. Casey Kerrigan, MD Archives of Physical Medicine and Rehabilitation Volume 86, Issue 11, Pages 2189-2194 (November 2005) DOI: 10.1016/j.apmr.2005.05.012 Copyright © 2005 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 1 The mean PE (solid line) and KE (dashed line) variations about their respective means for (A) controls and (B) children with CP. The PE curves were very similar between the 2 groups. However, the KE curve of the children with CP was smaller in amplitude and lagged behind that of the controls by more than 25°. Both differences reduce energy recovery. The mismatch between values at 0% and 100% of the gait cycle reflect stride-to-stride variations. Archives of Physical Medicine and Rehabilitation 2005 86, 2189-2194DOI: (10.1016/j.apmr.2005.05.012) Copyright © 2005 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 2 Plots of KE (dashed line) and PE (relative to mean COM position) for individual trials of (A) control subject and (B) patient with CP at similar velocities. Shaded areas are times when energy transfer cannot occur during walking cycle as PE and KE are moving in phase; with simultaneous increase or decrease in energies. Note that in the patient with CP, the PE variation (COM excursion) is greater while KE variation is less, and the energies are less symmetric than in the control. The patient with CP shows the often-displayed pattern of slowing down just before and after foot contact while COM is being lowered. Archives of Physical Medicine and Rehabilitation 2005 86, 2189-2194DOI: (10.1016/j.apmr.2005.05.012) Copyright © 2005 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig 3 Fourier coefficients of (A) the PE and (B) the KE for children with CP and controls walking at their preferred speed. FIH and FEH are indicated. FIH differed between groups for both PE and KE. FEH differed between groups for KE. *P<.02. Archives of Physical Medicine and Rehabilitation 2005 86, 2189-2194DOI: (10.1016/j.apmr.2005.05.012) Copyright © 2005 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions