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Kinematic and Somatosensory Gains in Infants with Cerebral Palsy After a Multi-Component Upper-Extremity
Nathalie L Maitre1,2,3, Arnaud Jeanvoine4, Paul J Yoder5
1Center for Perinatal Research at the Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH, USA. Nathalie.maitre@nationwidechildrens.org.
Insights
This study shows a neuroscience-based intervention significantly improves upper extremity (UE) motor skills and somatosensory processing in infants with cerebral palsy (CP). The treatment was safe and effective for enhancing developmental abilities.
Area of Science:
- Neuroscience
- Pediatric Rehabilitation
- Developmental Pediatrics
Background:
- Infants with cerebral palsy (CP) often exhibit upper extremity (UE) impairments due to altered motor experiences and sensory processing.
- Asymmetric neurological impairments in CP necessitate targeted interventions for affected UEs while ensuring safety for less-affected limbs.
- Current interventions may not fully address the complex interplay of sensory and motor deficits in infants with CP.
Purpose of the Study:
- To evaluate a neuroscience-based, multi-component intervention for improving UE somatosensory processing and motor function in infants with CP.
- To assess the safety of the intervention on less-affected UEs and overall gross motor function.
- To compare intervention effects against a waitlisted control group using objective motor and neurophysiological measures.
Main Methods:
- A randomized controlled trial involving infants aged 6-24 months with CP.
- The intervention group received a 4-week program including bimanual play, less-affected UE constraint, more-affected UE reach training, motor-sensory activities, and parent education.
- Outcomes measured included reach smoothness (3D kinematics), unimanual fine motor skills (Bayley scores), and EEG-assessed cortical somatosensory processing, benchmarked against typically developing infants.
Main Results:
- The intervention significantly improved reach smoothness (d = -0.90, p < .001) and unimanual fine motor skills (d = 0.35, p = .004) in the more-affected UE.
- Somatosensory processing showed significant improvement (d = 0.53, p = .04) with the intervention.
- The intervention demonstrated safety, with no adverse effects on the less-affected UE or gross motor function, although unexpected improvements in reach smoothness were noted in the less-affected UE (d = -0.85, p = .01).
Conclusions:
- This neuroscience-based intervention is effective and safe for improving sensory and motor system development in infants with CP.
- The findings support the use of targeted, multi-component therapies to enhance functional outcomes in infants with cerebral palsy.
- The intervention's positive effects on reach smoothness and developmental abilities highlight its potential for clinical application.
Abstract:
Upper extremity (UE) impairments in infants with cerebral palsy (CP) result from reduced quality of motor experiences and "noisy" sensory inputs. We hypothesized that a neuroscience-based multi-component intervention would improve somatosensory processing and motor measures of more-affected (UEs) in infants with CP and asymmetric UE neurologic impairments, while remaining safe for less-affected UEs. Our randomized controlled trial compared infants (6-24 months) with CP receiving intervention (N = 37) versus a waitlisted group (N = 36). Treatment effects tested a direct measurement of reach smoothness (3D-kinematics), a measure of unimanual fine motor function (Bayley unimanual fine motor raw scores), and EEG measures of cortical somatosensory processing. The four-week therapist-directed, parent-administered intervention included daily (1) bimanual play; (2) less-affected UE wearing soft-constraint (6 h/day, electronically-monitored); (3) reach training on more-affected UE; (4) graduated motor-sensory training; and (5) parent education. Waitlist infants received only bimanual play. Effectiveness and safety were tested; z-scores from 54 posttest-matched typically-developing infants provided benchmarks for treatment effects. Intervention and waitlist infants had no pretest differences. Median weekly constraint wear was 38 h; parent-treatment fidelity averaged > 92%. On the more affected side, the intervention significantly increased smoothness of reach (Cohen's d = - 0.90; p < .001) and unimanual fine motor skill (d = 0.35; p = .004). Using unadjusted p values, intervention improved somatosensory processing (d = 0.53; p = .04). All intervention effects referenced well to typically developing children. Safety of the intervention was demonstrated through positive- or non-effects on measurements involving the constrained, less-affected UE and gross motor function; unexpected treatment effects on reach smoothness occurred in less-affected UEs (d = - 0.85; p = .01). This large clinical trial demonstrated intervention effectiveness and safety for developing sensory and motor systems with improvements in reach smoothness, and developmental abilities.Clinical Trail Registration: ClinicalTrials.gov NCT02567630, registered October 5, 2015.
