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Laterality and prematurity.

N Marlow1, B L Roberts, R W Cooke

  • 1Department of Child Health, Liverpool Maternity Hospital.

Archives of Disease in Childhood
|December 1, 1989
PubMed
Summary
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Preterm infants showed higher rates of left-handedness. Neonatal brain injuries did not significantly affect the development of lateral preferences in children born before 31 weeks gestation.

Area of Science:

  • Neuroscience
  • Developmental Pediatrics
  • Human Biology

Background:

  • Preterm birth is associated with various developmental outcomes.
  • Lateral preference (e.g., handedness) is a complex trait with potential links to early brain development.
  • Understanding factors influencing lateral preference in preterm infants is crucial for developmental assessments.

Purpose of the Study:

  • To investigate the association between neonatal brain injuries and later lateral preference in very preterm children.
  • To determine the prevalence of left-sided preferences (hand, foot, eye) in this cohort.
  • To compare lateral preference rates in preterm children with and without neonatal brain lesions.

Main Methods:

  • A postal questionnaire assessed lateral preferences in 240 children born at less than 31 weeks' gestation.

Related Experiment Videos

  • Children had no major neurological impairment.
  • Neonatal cerebral ultrasound scans were used to identify brain injuries.

    • Main Results:

    • Left-hand preference was observed in 26.7% of children, left-foot preference in 29.2%, and left-eye preference in 35.8%.
    • Preterm children exhibited significantly higher rates of left-handedness compared to expected population frequencies.
    • Lateral preference frequencies were similar across children with normal neonatal scans, bilateral lesions, left-sided lesions, and right-sided lesions.

    Conclusions:

    • Very preterm children demonstrate increased rates of left-sided lateral preferences, particularly handedness.
    • The side or extent of neonatal brain injury did not appear to influence the development of lateral preference in this cohort of preterm infants without major impairments.
    • These findings suggest that factors other than specific neonatal brain lesions may contribute to altered lateralization patterns in preterm populations.