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Crouch gait in children with cerebral palsy requires careful management. Dynamic electromyography shows rectus femoris activity often occurs during swing phase, not stance, challenging previous surgical approaches.
Area of Science:
- Orthopedics
- Pediatric Rehabilitation
- Movement Science
Background:
- Crouch gait, characterized by excessive knee and hip flexion during stance, is a significant challenge in managing children with cerebral palsy.
- Historically, surgical interventions focused on releasing the rectus femoris muscle proximally, assuming its active role during the stance phase contributed to the gait deviation.
Purpose of the Study:
- To investigate the dynamic electromyographic activity of the rectus femoris muscle in children with cerebral palsy exhibiting crouch gait.
- To evaluate the appropriateness of routine proximal rectus femoris release based on its functional role during gait.
Main Methods:
- Dynamic electromyography was utilized to record the activity of the rectus femoris muscle in 45 children with cerebral palsy.
- The study aimed to differentiate rectus femoris activation from underlying vasti muscles, noting limitations of surface electrodes.
Main Results:
- Dynamic electromyography revealed that the rectus femoris muscle is more frequently active during the swing phase rather than the stance phase in children with cerebral palsy.
- Routine proximal rectus femoris release, without confirmation of stance phase activity, has been associated with the development of a stiff-legged gait.
Conclusions:
- The findings challenge the traditional approach of routine proximal rectus femoris release for crouch gait in cerebral palsy.
- Accurate assessment using electromyography is crucial to confirm rectus femoris function during stance before considering surgical intervention.
- Further attention to the specific functional role of the rectus femoris is necessary for optimizing gait in children with cerebral palsy.
Abstract:
A major concern in the management of children with cerebral palsy is crouch gait with its excessively flexed knee and hip stance. Earlier, attention was given to the flexed hip and it was assumed that the rectus femoris, as an active component of the quadriceps, contributed an unwanted effect. Proximal surgical release of the rectus from its attachment on the ilium was recommended. However, dynamic electromyographic records of 45 children with cerebral palsy demonstrated that the rectus more commonly was active in the swing phase, and such an approach is appropriate only when electromyography confirms that rectus function is occurring in stance. The recording technique must be capable of differentiating rectus femoris action from that of the underlying vasti, which surface electrodes are not able to do. Past experience indicates that routine inclusion of a proximal rectus femoris release (without confirmation that the muscle's action was limited to stance) resulted in the patient having a stiff-legged gait. Hence the actions of the rectus femoris need closer attention.