Electromechanical delay and reflex response in spastic cerebral palsy

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Electromechanical delay and reflex response in spastic cerebral palsy Kevin P. Granata, PhD, Andrea J. Ikeda, MS, Mark F. Abel, MD Archives of Physical Medicine and Rehabilitation Volume 81, Issue 7, Pages 888-894 (July 2000) DOI: 10.1053/apmr.2000.5578 Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig. 1 EMG and knee extensor force responses following a patellar tendon tap in a population of patients with spastic CP and in normally developing subjects. Response curves represent the mean of each population from both knee angles. The patellar tendon tap is at time t = 0. EMG data were normalized to isometric MVC levels. Archives of Physical Medicine and Rehabilitation 2000 81, 888-894DOI: (10.1053/apmr.2000.5578) Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig. 2 Reflex EMG in the quadriceps and antagonistic EMG response in the hamstrings were significantly greater in the patients with spastic CP than in the normal subjects. Peak reflex force responses were not statistically influenced by subject group. Archives of Physical Medicine and Rehabilitation 2000 81, 888-894DOI: (10.1053/apmr.2000.5578) Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig. 3 EMD was significantly lower in the CP group than in the normal group. Archives of Physical Medicine and Rehabilitation 2000 81, 888-894DOI: (10.1053/apmr.2000.5578) Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Fig. 4 Muscle force response as modeled in the appendix, representing the time-dependent behavior without antagonism, and the behavior including antagonistic contraction at a level of ρ =.25. EMD with antagonistic activity, EMD, is longer than without, EMD0. Archives of Physical Medicine and Rehabilitation 2000 81, 888-894DOI: (10.1053/apmr.2000.5578) Copyright © 2000 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions