Knee-ankle spasticity and strength relationships in spastic diplegia cerebral palsy
--*, --**
To determine the spasticity and strength relationships within a single muscle group and in opposing muscle groups at the knee and ankle joints in participants with spastic diplegia cerebral palsy (CP).

Design: Descriptive study comparing measures for spasticity and strength at both the knees and ankles in the same participants with CP.

Participants: Sixty participants with spastic diplegia CP (mean age 12 years, range 3 to 38 years) were tested for spasticity and strength at the knees and ankles.
For the spasticity measure, a KinCom dynamometer dorsiflexed/extended the passive ankles/knees of each subject at speeds of 10, 30, 60, 90, and 120o/s (120o/s at ankle only) while monitoring the resistive torque from the ankle plantar flexors/knee flexors. For the strength measure, the machine moved at 10o/s while the subject performed a maximum contraction of the dorsiflexors(df)/plantar flexors(pf) and knee flexors(fl)/extensors(ext). Work values from the torque-angle data were calculated for each speed and subject. The spasticity measures for the ankles and knees were slopes of the lines of best fit for the work-velocity data. The strength measures were the maximum (max) torques generated and the work done by the ankle and knee muscles. A Pearson correlation coefficient was used to determine if a significant relationship (p<0.05) existed between spasticity and strength within the same muscle group and at opposing muscle groups at the ankle and knee joint.
Correlation Between Spasticity and Strength
There were no significant relationships between spasticity and strength both within the same muscle group and between opposing muscle groups at the knee and ankle joints in participants with CP. The literature suggests that a spastic muscle is strong and that the muscle imbalance imposed by the spastic muscle causes weakness in the opposing muscle group. The results of this study do not agree with the literature. There appears to be no relationship between spasticity and strength for these muscle groups in participants with CP.
How to Cite URL :
MHS P R A S, PHD E R J.. Available From : Conference_abstracts/report.aspx?reportid=112
Disclaimer: The information given by is provided by medical and paramedical & Health providers voluntarily for display & is meant only for informational purpose. The site does not guarantee the accuracy or authenticity of the information. Use of any information is solely at the user's own risk. The appearance of advertisement or product information in the various section in the website does not constitute an endorsement or approval by Pediatric Oncall of the quality or value of the said product or of claims made by its manufacturer.
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.