Abstract:
:This study examined whether children with hemiplegic cerebral palsy (CP) have anticipatory control of fingertip forces during lifts of familiar objects, and what type of practice (blocked or random) best enhances the retention of anticipatory control during lifts of novel objects. Eighteen children with hemiplegic CP (7 females, 11 males; 7 to 14 years of age, mean age 10 years, SD 1.8) and 18 age-matched typically developing children (8 males, 10 females; mean age 10.4 years, SD 1.7) participated in the study. In the first experiment the children lifted familiar objects of various weights and sizes five times each, while the vertical lifting (load) force was measured. Most participants demonstrated higher rates of load force increase for heavier (and larger) objects already during the first lift, indicating anticipatory control. Furthermore, the load force rates generally were similar across the five lifts for each object, suggesting that they had stable representations of the objects' properties. In the second experiment children lifted three novel objects varying in weight (but identical in volume) 27 times each, in either a blocked or a random order, followed by nine immediate and nine delayed (24 hours) retention trials. Blocked practice resulted in greater differentiation of the force rates between objects during acquisition than did random practice. Both practice schedules resulted in similar retention. These findings suggest that children with hemiplegic CP have a priori internal representations used for anticipatory force scaling with familiar objects. Furthermore, the results indicate that these children can form and retain internal representations of novel objects for anticipatory control, irrespective of the type of practice schedule employed. Thus, clinically based practice sessions that incorporate lifts with novel objects may enhance anticipatory force scaling and related prehensile function in children with hemiplegic CP.
journal_name
Dev Med Child Neuroljournal_title
Developmental medicine and child neurologyauthors
Duff SV,Gordon AMdoi
10.1017/s0012162203001397subject
Has Abstractpub_date
2003-11-01 00:00:00pages
746-57issue
11eissn
0012-1622issn
1469-8749journal_volume
45pub_type
临床试验,杂志文章,随机对照试验abstract::Twenty-one individuals (19 females, two males) with teenage-onset anorexia nervosa (AN), 19 of whom were weight restored, were assessed using single-photon emission computed tomography (SPECT) 7 years after onset of AN, at a mean age of 22 years. For comparison we recruited a younger group without neuropsychiatric dis...
journal_title:Developmental medicine and child neurology
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abstract::In a survey conducted by a UK urban general practice, 98.1 per cent (1083) of the children registered aged three to 11 years took part in an interview. Possible migraine subjects took part in an extended interview, the results of which were recorded using three different sets of diagnostic criteria: Vahlquist, Ad Hoc ...
journal_title:Developmental medicine and child neurology
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abstract:AIM:To investigate postural adjustments during reaching in infants at high risk for cerebral palsy (CP). METHOD:Observational cohort study in which 25 infants at high risk (11 males, 14 females) and 11 infants with typical development (six males, five females) were assessed at 4, 6, and 18 months corrected age. Reachi...
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journal_title:Developmental medicine and child neurology
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