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Basic co-ordination of manipulative forces of children with cerebral palsy
A C Eliasson1, A M Gordon, H Forssberg
1Nobel Institute for Neurophysiology, Karolinska Institute, Stockholm, Sweden.
Insights
Children with cerebral palsy (CP) exhibit impaired force coordination during grasping. They show delayed anticipatory control and inefficient sensory feedback, potentially compensating with excessive grip force.
Area of Science:
- Neuroscience
- Developmental Pediatrics
- Motor Control
Background:
- Cerebral palsy (CP) often affects motor control, including fine motor skills.
- Understanding force coordination in prehension is crucial for assessing upper limb function in children.
Purpose of the Study:
- To investigate the coordination of manipulatory forces during prehension in children with CP.
- To compare motor control strategies between children with CP and typically developing controls.
Main Methods:
- Studied 12 children with cerebral palsy and a control group.
- Analyzed the coupling of grip force and load force during prehension tasks.
Main Results:
- Children with CP did not develop normal grip and load force coupling.
- Force development occurred in stages with early excessive grip force.
- Lack of anticipatory isometric force control and prolonged phase delays indicated inefficient sensory feedback.
Conclusions:
- Children with CP demonstrate significant deficits in force coordination during prehension.
- Early excessive grip force may be a compensatory mechanism for impaired anticipatory control and sensorimotor integration.
Abstract:
The coordination of manipulatory forces during prehension was studied in 12 children with cerebral palsy (CP) and compared with that of controls. The results indicated that coupling of grip force and load force does not develop in children with CP. These children's force development increased in stages, with an early onset of excessive grip force. They did not use anticipatory control of the isometric force development during the load phase. Prolonged delays between successive phases indicated inefficient sensory feedback during the movement. The early onset of grip force and the over-all high force employment may compensate for the lack of anticipatory control and inefficient sensorimotor integration.