Managing spastic hypertonia in children with cerebral palsy via repetitive passive knee movements

Area of Science:

• Rehabilitation Medicine
• Pediatric Physical Therapy
• Neurology

Background:

• Cerebral palsy (CP) frequently causes lower extremity spastic hypertonia, impacting gait.
• Effective management of muscle tone is crucial for improving motor function in children with CP.

Purpose of the Study:

• To investigate the effects of continuous passive motion (CPM) on spastic hypertonia and ambulatory function in children with CP.
• To assess changes in range-of-motion, muscle tone, and walking ability following CPM intervention.

Main Methods:

• A repeated measures design was employed with sixteen children diagnosed with cerebral palsy.
• Intervention involved applying CPM to the knees at velocities of 15º/s and 0º/s (control) for 20 minutes.
• Outcomes measured included active and passive range-of-motion, Modified Ashworth Scale scores, relaxation index, Timed Up-and-Go test, and 6-Minute Walk test.

Main Results:

• The 15º/s CPM intervention led to significant improvements: increased active range-of-motion and relaxation index, decreased spasticity (Modified Ashworth Scale), and enhanced ambulatory function (decreased Timed Up-and-Go, increased 6-Minute Walk test).
• No significant changes were observed in passive range-of-motion.
• The 0º/s control condition did not yield statistically significant differences in any measured variables.

Conclusions:

• Repetitive passive motion at 15º/s effectively reduces lower extremity spastic hypertonia in children with cerebral palsy.
• CPM therapy demonstrates potential for improving ambulatory function, specifically walking speed and endurance, in this population.