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Contact pressure distribution features in Down syndrome infants in supine and prone positions, analyzed by
Yoshiki Nishizawa1, Takehisa Fujita, Kazuhiko Matsuoka
1Department of Pediatrics, Nippon Medical School Musashi-Kosugi Hospital, Kawasaki, Kanagawa, Japan.
Insights
Infants with Down syndrome (DS) show different bodyweight distribution and poorer limb support compared to healthy infants. This study developed methods to assess these differences for early therapeutic evaluation.
Area of Science:
- Biomedical Engineering
- Developmental Pediatrics
- Clinical Biomechanics
Background:
- Infants with Down syndrome (DS) exhibit altered local force distribution for bodyweight support compared to healthy controls.
- Understanding these differences is crucial for early therapeutic interventions in DS.
Purpose of the Study:
- To develop and validate methods for assessing bodyweight force distribution in infants.
- To evaluate neurological development in infants with DS before they begin walking.
Main Methods:
- Photoelastic methods were used to measure contact pressure distribution patterns in supine and prone positions.
- DS infants (n=8) and healthy controls (n=26) were compared.
Main Results:
- Head loading ratio decreased with age in both groups, but less so in DS infants.
- DS infants showed no significant difference in weight distribution between prone and supine positions, unlike controls.
- Limb loading ratios were significantly lower in DS infants, indicating poorer limb support.
Conclusions:
- Coordinated development of weight-supporting limbs appears to be impaired in infants with Down syndrome.
- The developed methods can aid in the early assessment and therapeutic evaluation of DS infants.
Background:
Local force distribution supporting the bodyweight of infants with Down syndrome (DS) appears to be different from that of healthy controls. The purpose of the present study was to establish methods to assess this force distribution and to allow therapeutic evaluation of neurological development in DS infants prior to walking.
Methods:
Contact pressure distribution patterns in supine and prone positions were measured by photoelastic methods and were compared between DS infants and healthy controls. The DS group included eight subjects, seven with regular trisomy 21, and one with a Robertson translocation. The controls consisted of 14 neonates, four 4-month-old infants and eight 7-month-old infants.
Results:
In both groups, head loading ratio decreased as age advanced but the decrement was less in the test group than in the control group. When the bodyweight loading ratios were measured in two different lying positions, that is, prone and supine, the ratios for prone generally tended to be smaller than those for supine in the controls. This kind of difference between prone and supine was not seen in the DS group. The bodyweight is somewhat sustained with limbs and the limbs loading ratios in the DS group were always significantly lower than in the controls.
Conclusion:
Coordinated development of weight-supporting limbs seems to be poor in the DS group.
