Functional electrical stimulation to lower limb muscles after botox in children with cerebral palsy

Area of Science:

• Pediatric Rehabilitation
• Neuromuscular Electrical Stimulation

Background:

• Cerebral palsy (CP) often leads to gait impairments.
• Botulinum toxin injections are used to manage spasticity in CP.
• Functional electrical stimulation (FES) is a potential adjunct therapy.

Purpose of the Study:

• To evaluate the impact of lower limb FES post-botulinum toxin injection in children with CP.
• To assess effects on walking speed and muscle strength (plantar flexors and dorsiflexors).
• To determine the optimal timing for initiating FES after botulinum toxin treatment.

Main Methods:

• A single-subject design was employed with five pediatric participants with CP.
• Subjects received a botulinum toxin injection into the calf muscle.
• A 4-week home-based FES program was implemented, with adherence varying among participants.

Main Results:

• Functional electrical stimulation (FES) significantly increased isometric plantar flexor muscle strength.
• No significant changes were observed in self-selected walking speeds.
• Isometric dorsiflexor strength also did not show improvement with FES intervention.
• An interval of approximately 32 days between botulinum toxin injection and FES initiation appeared most effective.

Conclusions:

• FES following botulinum toxin injection shows promise in enhancing specific gait-related muscle strength in children with CP.
• Current findings suggest FES may be beneficial for certain gait variables, but not universally for all measures like walking speed.
• Further research is warranted to confirm these preliminary findings and optimize therapeutic protocols.