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Maternal stress and behavior modulate relationships between neonatal stress, attention, and basal cortisol at 8

Mai Thanh Tu1, Ruth E Grunau, Julie Petrie-Thomas

  • 1Centre for Community Child Health Research Child and Family Research Institute Children's and Women's Health Centre of British Columbia, L408-4480 Oak Street Vancouver, V6H 3V4 Canada.

Developmental Psychobiology
|February 15, 2007
PubMed

Insights

Maternal interactive behaviors can protect preterm infants from the negative effects of early life stress on attention. High cortisol levels in infants with high maternal stress and overwhelming interaction were linked to poorer focused attention.

Area of Science:

  • Neonatal development
  • Neuroendocrinology
  • Developmental psychology

Background:

  • Preterm infants exhibit altered cortisol secretion trajectories, potentially linked to neonatal pain-related stress.
  • Elevated basal cortisol levels in preterm infants may increase the risk of impaired neurodevelopment.
  • Maternal factors significantly influence infant stress responses and regulatory mechanisms.

Purpose of the Study:

  • To investigate the interplay between infant (neonatal pain-related stress, attention, cortisol) and maternal (stress, interactive behaviors) factors at 8 months corrected age (CA) in preterm infants.
  • To determine if maternal factors can buffer the impact of early life stress on infant neurodevelopment.
  • To explore the association between cortisol levels, maternal factors, and cognitive outcomes in preterm infants.

Main Methods:

  • Longitudinal study assessing preterm infants at 8 months corrected age (CA).
  • Measured neonatal pain-related stress exposure, infant attention (focused attention), basal cortisol levels, maternal stress levels, and maternal interactive behaviors.
  • Statistical analyses to examine buffering effects and associations between variables.

Main Results:

  • Interactive maternal behaviors buffered the negative association between high neonatal pain-related stress and focused attention in infants of mothers with low concurrent stress.
  • In preterm infants experiencing high maternal stress and overwhelming maternal interaction, elevated basal cortisol levels correlated with poorer focused attention.
  • Maternal factors demonstrated a significant role in modulating cognitive resilience in preterm infants exposed to early life stress.

Conclusions:

  • Maternal interactive behaviors can promote cognitive resilience in preterm infants facing early life stress.
  • The relationship between infant cortisol, maternal stress, and attention is complex and context-dependent.
  • Targeting maternal factors may offer a strategy to improve neurodevelopmental outcomes in preterm infants.

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