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Rhythmic motor behavior of preambulatory motor impaired, Down syndrome and nondisabled children: a comparative
W E MacLean1, D N Ellis, H N Galbreath
1Peabody College of Vanderbilt University, Nashville, Tennessee 37203.
Insights
Children with Down syndrome exhibit rhythmic motor behaviors more similar to typically developing peers than those with motor impairments. This study tracked developmental changes in preambulatory children.
Area of Science:
- Developmental psychology
- Neuroscience
- Pediatric motor development
Background:
- Rhythmic motor behavior is crucial for development.
- Understanding developmental trajectories in atypical populations is essential.
- Previous research has not fully elucidated the nuances of rhythmic motor behavior in Down syndrome and motor-impaired infants.
Purpose of the Study:
- To longitudinally examine the developmental course of rhythmic motor behavior in preambulatory children.
- To compare rhythmic motor behavior across normally developing, Down syndrome, and profoundly motor-impaired groups.
- To identify differences in specific subtypes of rhythmic motor behavior.
Main Methods:
- Longitudinal study design.
- Inclusion of three groups: normally developing, Down syndrome, and profound motor impairment.
- Comparison based on motor age, not chronological age.
Main Results:
- Motor-impaired children showed significantly less rhythmic motor behavior than typically developing and Down syndrome groups.
- Differences observed in the number of bouts and duration of specific rhythmic motor behavior subtypes.
- Rhythmic motor behavior in children with Down syndrome was more similar to typically developing children than to motor-impaired children.
Conclusions:
- Children with Down syndrome demonstrate a developmental trajectory for rhythmic motor behavior that more closely resembles typically developing infants compared to those with profound motor impairment.
- Specific subtypes of rhythmic motor behavior show considerable variability across all groups.
- Motor age is a critical factor when comparing developmental patterns in these diverse groups.
Abstract:
The developmental course of rhythmic motor behavior was followed longitudinally for three groups of preambulatory children--normally developing, Down syndrome, and those with profound motor impairment. The groups differed in chronological age but were comparable with respect to motor age. The motor impaired subjects displayed significantly less rhythmic motor behavior than the nondisabled and Down syndrome groups. In comparing particular subtypes of rhythmic motor behavior, differences were found in both the average number of bouts and duration of subtypes among the groups. Longitudinal analyses of the data over the entire observation period revealed that the rhythmic motor behavior of the children with Down syndrome was more similar to that exhibited by the nondisabled children than was the rhythmic motor behavior of the children with motor impairment. However, there was considerable variability among the groups in several particular subtypes.