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Kinematic characteristics of postural control during reaching in preterm children with cerebral palsy
Jolanda C van der Heide1, Johanna M Fock, Bert Otten
1Department of Neurology, University Hospital Groningen, The Netherlands.
Insights
Children with cerebral palsy (CP) exhibit distinct sitting postures affecting reaching quality. Physiotherapy should focus on head stability and trunk mobility for improved function in children with CP.
Area of Science:
- Neurology
- Pediatrics
- Biomechanical Engineering
Background:
- Children with cerebral palsy (CP) often display atypical sitting postures.
- Understanding the relationship between posture and motor function is crucial for targeted interventions.
Purpose of the Study:
- To investigate the link between sitting posture kinematics and reaching movement quality in children with CP.
- To explore the association between sitting posture and functional performance in daily activities.
Main Methods:
- Kinematic analysis of sitting posture and reaching movements in 51 children with CP (aged 2-11 years) and 26 typically developing children.
- Assessment of functional performance using the Pediatric Evaluation of Disability Inventory (PEDI).
- Comparison of postural and kinematic data between children with CP (spastic hemiplegia and bilateral CP) and typically developing peers.
Main Results:
- Children with CP demonstrated a more reclined pelvis and a more collapsed trunk in their sitting posture compared to typically developing children.
- A more reclined pelvic position correlated with better reaching movement quality.
- While initial sitting postures were not linked to functional performance, greater head stability, trunk mobility, and pelvic stability in children with CP were associated with improved functional performance and/or reaching quality.
Conclusions:
- Sitting posture characteristics in children with CP differ from typically developing peers, with a reclined pelvis linked to better reaching.
- Therapeutic interventions for children with CP should prioritize enhancing head stability, trunk mobility, and pelvic stability for functional gains, rather than solely focusing on initial sitting alignment.
Abstract:
The relationships between kinematic characteristics of sitting posture during reaching movements of the dominant arm and 1) the kinematics of the reaching movement itself and 2) functional performance during daily life activities (PEDI) were assessed in 51 sitting preterm children with cerebral palsy (CP). The children were 2-11 y, 33 had spastic hemiplegia (SH) and 18 bilateral CP (Bi-CP). The data were compared with those of 26 typically developing children (TD). Sitting posture before the onset of reaching of children with CP differed from that of TD children: they sat with a more reclined pelvis and a more collapsed trunk. The more reclined pelvic position was associated with a better quality of reaching movements. The different sitting postures of pelvis and trunk were not related to functional performance during daily life activities. Displacement of the head, trunk, and pelvis of the children with CP did not differ from that of the TD children. Nevertheless, in the children with CP a more stable head, a more mobile trunk, and a more stable pelvis were related to better functional performance and/or a better quality of reaching. This suggests that physiotherapeutic guidance of children with CP should focus rather on the latter postural parameters than on the different sitting posture of pelvis and trunk.
