Related Experiment Video
Updated: Jul 4, 2025
Methods to Quantify Pharmacologically Induced Alterations in Motor Function in Human Incomplete SCI
Published on: April 18, 2011
Selective dorsal rhizotomy and its effect on muscle force during walking: A comprehensive study
Emiliano Pablo Ravera1, Adam Rozumalski2
1Group of Analysis, Modeling, Processing and Clinician Implementation of Biomechanical Signals and Systems, Bioengineering and Bioinformatics Institute, CONICET-UNER, Oro Verde, Argentina; Human Movement Research Laboratory, School of Engineering, National University of Entre Ríos (UNER), Oro Verde, Argentina.
Selective dorsal rhizotomy (SDR) reduces spasticity in children with cerebral palsy (CP) without affecting muscle strength. SDR enhances muscle force during walking, improving the dynamic environment for movement.
Area of Science:
- Neurology
- Orthopedics
- Biomechanical Engineering
Background:
- Selective dorsal rhizotomy (SDR) is a surgical procedure to reduce spasticity in children with cerebral palsy (CP).
- Previous research on SDR's impact on muscle strength and activity post-surgery has shown varied results.
- Recent studies suggest SDR may improve muscle forces during walking by reducing dynamic constraints.
Purpose of the Study:
- To assess the effects of SDR on spasticity, muscle strength, and muscle activity during walking in children with CP.
- To compare outcomes between children with CP who underwent SDR and a matched control group without SDR.
- To investigate the influence of SDR on muscle force production using NMSK simulations.
Main Methods:
- Combined physical examinations and NMSK ( nedenle, musculoskeletal) simulations.
- Compared 81 children with CP post-SDR to 81 well-matched children with CP without SDR.
- Conducted pre- and post-SDR assessments, analyzing gait parameters, muscle strength, and muscle activity.
Main Results:
- SDR significantly reduced spasticity without negatively impacting muscle strength.
- No significant differences were observed in gait deviation index or walking speed improvements between SDR and No-SDR groups.
- NMSK simulations showed increased muscle force in semimembranosus and calf muscles post-SDR compared to other treatments for CP.
Conclusions:
- SDR effectively reduces spasticity in children with CP.
- While not increasing overall muscle strength, SDR optimizes the dynamic environment for muscle force generation during walking.
- SDR offers a favorable biomechanical advantage for walking in children with CP.
