Upper extremity tendon transfers in cerebral palsy: electromyographic and functional analysis

Area of Science:

• Orthopedic Surgery
• Pediatric Neurology
• Rehabilitation Medicine

Background:

• Spastic hemiplegia, a common form of cerebral palsy, often impairs upper extremity function.
• Tendon transfer surgery is a common intervention to improve hand and wrist function in affected children.

Purpose of the Study:

• To evaluate the effectiveness of tendon transfers in improving functional outcomes for children with spastic hemiplegia.
• To analyze changes in muscle electrical activity following tendon transfer surgery.

Main Methods:

• Preoperative and postoperative assessments included muscle grading, functional video recordings, and electromyography (EMG) in 12 pediatric patients.
• Postoperative EMG data were collected from 16 transferred tendons in eight patients during functional tasks.

Main Results:

• All patients demonstrated clinical improvement at an average 20-month follow-up.
• Four of the 16 transferred muscles exhibited altered electrical activity postoperatively.
• Specifically, three continuously firing muscles became phasic, and one muscle shifted its activation phase.

Conclusions:

• Tendon transfers lead to functional improvements in children with spastic hemiplegia.
• Pre- and postoperative EMG combined with video analysis offers valuable insights into tendon transfer mechanics in cerebral palsy.
• These findings contribute to a better understanding of tendon function post-transfer in this patient population.