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Trunk position in supine of infants born preterm and at term: an assessment using a computerized pressure mat

Stacey Dusing1, Vicki Mercer, Bing Yu

  • 1Division of Physical Therapy (S.D., V.M., B.Y., M.R., D.T.) University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7135, USA. sdusing@nc.rr.com

Pediatric Physical Therapy : the Official Publication of the Section on Pediatrics of the American Physical Therapy Association
|December 17, 2005
PubMed

Insights

Infants born preterm do not show more trunk extension than term infants when lying down. Further research is needed due to small sample sizes and variability in trunk positioning.

Area of Science:

  • Neonatal development
  • Infant motor control
  • Biomechanical analysis

Background:

  • Trunk position is crucial for infant motor, cognitive, and social development.
  • Quantitative assessment of infant trunk position in supine has been limited.
  • Understanding trunk positioning in preterm and term infants is essential for developmental monitoring.

Purpose of the Study:

  • To quantitatively assess and compare the trunk positions of preterm and term infants in the supine position.
  • To utilize a computerized pressure mat system for objective trunk position measurement.
  • To investigate potential differences in trunk positioning between preterm and term infants.

Main Methods:

  • Utilized a computerized pressure mat to measure trunk position via head, pelvis, and trunk pressure ratios.
  • Assessed 18 healthy preterm infants (mean gestational age 31.9 weeks) and 15 healthy term infants (mean gestational age 38.9 weeks).
  • Evaluated infants between 38 to 43 weeks gestational age.

Main Results:

  • Term infants spent over two-thirds of supine time in flexed or neutral trunk positions.
  • No significant differences were observed in total duration of trunk flexion or extension between preterm and term infants.
  • No significant differences were found in the duration of flexion events between the two groups.

Conclusions:

  • Preterm infants do not appear to exhibit greater trunk extension tendencies in supine compared to term infants.
  • Findings should be interpreted cautiously due to small sample size and observed variability.
  • Infants born before 30 weeks gestation might show greater extension tendencies than those born after 30 weeks.
Abstract

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