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Combining constraint-induced movement therapy and action-observation training in children with unilateral cerebral
Cristina Simon-Martinez1, Lisa Mailleux2, Els Ortibus3
1Department of Rehabilitation Sciences, KU Leuven - University of Leuven, Leuven, Belgium. cristina.simon@kuleuven.be.
Insights
This study investigates if adding Action-Observation Training to modified Constraint-Induced Movement Therapy improves upper limb function in children with unilateral cerebral palsy. It also explores neurological factors that may predict treatment success.
Area of Science:
- Pediatric Rehabilitation
- Neuroscience
- Motor Learning
Background:
- Children with unilateral cerebral palsy (uCP) often have upper limb (UL) deficits.
- Traditional treatments like modified Constraint-Induced Movement Therapy (mCIMT) focus on motor execution.
- New neurophysiological approaches, such as Action-Observation Training (AOT), offer potential for enhanced motor learning.
Purpose of the Study:
- To describe a randomized controlled trial (RCT) protocol.
- To evaluate the added value of AOT combined with mCIMT versus mCIMT alone for UL function in children with uCP.
- To analyze neurological factors as potential biomarkers for treatment response.
Main Methods:
- An evaluator-blinded RCT involving 42 children (6-12 years) with uCP.
- Stratification based on functional scale, age, and corticospinal tract wiring.
- A 2-week intensive day-camp intervention: mCIMT (54h) with either AOT (15h) or a control condition.
- Outcome measures include the Assisting Hand Assessment, ICF-based clinical assessments, 3D motion analysis, and pre-intervention brain imaging (structural/functional connectivity, TMS).
Main Results:
- The study protocol is designed to compare the efficacy of combined mCIMT and AOT against mCIMT alone.
- It aims to identify neurological biomarkers predictive of treatment response.
- Longitudinal assessment of UL function at baseline, post-intervention, and 6-month follow-up.
Conclusions:
- This RCT protocol outlines a rigorous methodology to assess the benefits of integrating AOT with mCIMT for pediatric uCP.
- It seeks to advance understanding of neurophysiological mechanisms underlying motor rehabilitation in children.
- The findings are expected to inform personalized treatment strategies by identifying predictive neurological markers.
Background:
Upper limb (UL) deficits in children with unilateral cerebral palsy (uCP) have traditionally been targeted with motor execution treatment models, such as modified Constraint-Induced Movement Therapy (mCIMT). However, new approaches based on a neurophysiological model such as Action-Observation Training (AOT) may provide new opportunities for enhanced motor learning. The aim of this study is to describe a randomised controlled trial (RCT) protocol investigating the effects of an intensive treatment model, combining mCIMT and AOT compared to mCIMT alone on UL function in children with uCP. Additionally, the role of neurological factors as potential biomarkers of treatment response will be analysed.
Methods:
An evaluator-blinded RCT will be conducted in 42 children aged between 6 and 12 years. Before randomization, children will be stratified according to their House Functional Classification Scale, age and type of corticospinal tract wiring. A 2-week day-camp will be set up in which children receive intensive mCIMT therapy for 6 hours a day on 9 out of 11 consecutive days (54 h) including AOT or control condition (15 h). During AOT, these children watch video sequences showing goal-directed actions and subsequently execute the observed actions with the more impaired UL. The control group performs the same actions after watching computer games without human motion. The primary outcome measure will be the Assisting Hand Assessment. Secondary outcomes comprise clinical assessments across body function, activity and participation level of the International Classification of Function, Disability and Health. Furthermore, to quantitatively evaluate UL movement patterns, a three-dimensional motion analysis will be conducted. UL function will be assessed at baseline, immediately before and after intervention and at 6 months follow up. Brain imaging comprising structural and functional connectivity measures as well as Transcranial Magnetic Stimulation (TMS) to evaluate corticospinal tract wiring will be acquired before the intervention.
Discussion:
This paper describes the methodology of an RCT with two main objectives: (1) to evaluate the added value of AOT to mCIMT on UL outcome in children with uCP and (2) to investigate the role of neurological factors as potential biomarkers of treatment response.
Trial Registration:
NCT03256357 registered on 21st August 2017 (retrospectively registered).
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