Spontaneous motility in preterm, small-for-gestational age infants. I. Quantitative aspects

Area of Science:

• Neonatal Neurology
• Developmental Pediatrics
• Movement Science

Background:

• Intrauterine growth retardation (IUGR) affects fetal development, potentially impacting early motor function.
• Understanding the quantitative aspects of spontaneous motility is crucial for assessing neurodevelopmental outcomes in high-risk infants.

Purpose of the Study:

• To longitudinally assess the quantitative aspects of early spontaneous motility in infants with IUGR.
• To investigate the relationship between motility patterns, perinatal factors, brain ultrasound, and neurological outcomes.
• To compare motility in IUGR infants with a low-risk preterm reference group.

Main Methods:

• Longitudinal study of 14 IUGR infants (birth weight <5th percentile) from birth to term age.
• 1-hour videotape recordings analyzed using Prechtl's classification of spontaneous movement patterns.
• Comparison with a control group of preterm, appropriate-for-gestational age infants.

Main Results:

• Inconsistent significant differences in motility between IUGR and control groups, except possibly for a decreased startle rate (2-6 weeks).
• A trend of increasing General Movements (GMs) duration with postnatal age was observed.
• Weak correlations found between some perinatal variables (heart rate variability, blood glucose) and specific motility parameters in the first week.

Conclusions:

• Intrauterine growth retardation has minimal to no discernible effect on the quantitative aspects of spontaneous motility during the preterm period.
• Early postnatal motility patterns in IUGR infants are largely comparable to those of appropriate-for-gestational age preterm infants.
• Perinatal factors show limited correlation with early quantitative motility in this cohort.