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Disorders of memory of motor sequences in cerebral palsied children
I Lesný1, M Nachtmann, A Stehlik
1Centre for Motor Handicapped Children, Zeleznice, Eastern Bohemia.
Insights
Motor memory deficits are common in children with cerebral palsy (CP). Nearly half of CP children studied showed impaired motor memory, particularly those with left-sided hemiparesis or less severe spasticity.
Area of Science:
- Neuroscience
- Developmental Pediatrics
- Motor Control
Background:
- Cerebral palsy (CP) affects motor function in children.
- Motor memory, the ability to recall and reproduce movement sequences, is crucial for motor learning.
- The prevalence and characteristics of motor memory disorders in CP are not fully understood.
Purpose of the Study:
- To investigate motor memory function in children with cerebral palsy.
- To compare motor memory performance in CP children with healthy controls.
- To identify potential differences in motor memory deficits based on CP type and laterality.
Main Methods:
- Assessed motor memory in 74 children (7-14 years) with CP using a sequential movement task.
- Tested recall immediately, after 24 hours, and after 5 days.
- Compared performance to 21 age-matched healthy children.
- Scored movement accuracy and sequence correctness.
Main Results:
- Motor memory disorders were identified in 48.5% of children with CP.
- Deficits were more prevalent in left-sided hemiparesis compared to right-sided.
- Paucospastic diparesis showed more frequent memory impairments than the classical form.
Conclusions:
- Motor memory impairment is a significant feature in the natural history of cerebral palsy.
- Specific CP subtypes and hemiparesis laterality are associated with higher risks of motor memory deficits.
- These findings highlight the need for targeted memory assessments and interventions in pediatric CP care.
Abstract:
In 74 children (32 boys, 42 girls) between 7 and 14 years of age with different forms of cerebral palsy (mainly spastic ones) the motor memory was tested with a sequence of movements which had to be remembered at once, after 24 hours and after 5 days. The normal levels were determined by testing 21 healthy children matched as to age as control as (10 boys, 11 girls). Each exercise was evaluated separately as follows: the movement is performed correctly in the right sequence, 2 points; the movement is performed in a wrong sequence, but in the correct group of three exercises, 1 point; the sequence of movements is entirely wrong or the child does not perform the movements at all, 0 points. Thus for each testing a child can get a maximum of 12 points and for all three testings a maximal 36 points. In 48.5% of the CP children a disorder of memory was found, more frequently in left-sided hemiparesis than in right-sided, and more frequently in paucospastic diparesis (without adductor or flexor spasms and without flexor spastic signs in the toes) than in the classical form. Thus a motor memory disorder is part of the natural history of CP.
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