27: Exploring Sensorimotor Plasticity in Hemiplegic Cerebral Palsy Following Constraint-Induced Movement Therapy
Bibliographic record
Abstract
Children with hemiplegic cerebral palsy (HCP) experience upper limb sensory processing and motor deficits. Current interventions focus on motor deficits while sensory impairments are overlooked. Movement and sensation are intimately related and theories on motor behavior support addressing both. While constraint-induced movement therapy (CIMT) has demonstrated effectiveness in improving upper limb motor function in HCP, its impact on sensory function remains unknown at both the clinical and neural level. The primary objective of this study was to evaluate the effectiveness of CIMT in improving clinical and neural sensory function in children with HCP. Ten children with HCP were recruited from the HCP registry (CP-NET). Participants attended a 3-week CIMT intervention and completed neuroimaging and clinical assessments one week before and one week after CIMT. Bilateral somatosensory evoked fields (SEFs) to tactile stimulation were recorded using magnetoencephalography (MEG) to assess neuroplastic changes in the somatosensory cortex (SI) corresponding to the affected hand (measured by mean peak amplitude of the SEF). Clinical sensory assessments included: two-point discrimination (2PD), tactile registration, stereognosis (to assess tactile function), proprioception and kinesthesia tests (body motion awareness). Paired parametric and non-parametric tests assessed changes in clinical sensory measures. Voxel-wise permutation analysis evaluated significant differences in brain activity in the region of interest of the S1 cortex, pre- and post- CIMT. Post CIMT, there was a reduction in mean target degree error of the proprioceptive task (4.6 degrees, P=0.03) indicating an increase in joint position sense accuracy. Other clinical sensory measures including tactile registration of the index finger, 2PD and kinesthesia showed trends towards improvement post CIMT. MEG data revealed a significant post-CIMT increase (P≤0.05, moment=5.57 nanoamperes) SEF amplitude at a latency of 50 milliseconds corresponding to neuronal changes within the affected S1 post central gyrus (BA3) contralateral to the affected hand. This study found improved proprioception in children with HCP after CIMT along with positive trends in other sensory modalities. Importantly, neuroplastic change in sensory processing of tactile information was also identified in the primary sensory area of the injured hemisphere. This study provides a basis for further research to be done on how CIMT addresses deficits in various sensory modalities. Sensory deficits should be considered a critical factor to remediate in “motor” rehabilitation programs aimed to improve functioning.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".