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Minor neurological dysfunction and IQ in 9-year-old children born at term

Hedwig K Kikkert1, Corina DE Jong, Mijna Hadders-Algra

  • 1Department of Paediatrics - Developmental Neurology, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands.

Developmental Medicine and Child Neurology
|March 16, 2011
PubMed

Insights

Minor neurological dysfunction (MND) in term-born children is linked to IQ. Specific types of MND, like fine motor and coordination issues, are associated with lower IQ scores, not just the severity.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Pediatrics

Background:

  • Minor neurological dysfunction (MND) is a subtle condition affecting motor skills and coordination.
  • Understanding the impact of MND on cognitive development, specifically IQ, is crucial for early intervention.

Purpose of the Study:

  • To investigate the relationship between the severity and type of minor neurological dysfunction (MND) and IQ in 9-year-old children.
  • To determine if specific patterns of MND are more strongly associated with cognitive deficits.

Main Methods:

  • Neurological assessment using Touwen criteria in 341 term-born children (mean age 9 years).
  • Classification of MND into simple (sMND) and complex (cMND) based on the number of dysfunctional domains.
  • Assessment of Verbal, Performance, and Full-scale IQ (FSIQ) using the Wechsler Abbreviated Scale of Intelligence.

Main Results:

  • Children with MND (sMND and cMND) exhibited lower IQ scores compared to neurologically normal children.
  • No significant difference in IQ was found between children with sMND and cMND.
  • Fine manipulative disability and coordination problems were specifically associated with reduced IQ scores.

Conclusions:

  • The type of minor neurological dysfunction (MND), particularly fine motor and coordination impairments, is more significantly associated with lower IQ than the overall severity.
  • These findings highlight the importance of identifying specific MND subtypes for understanding cognitive outcomes in children.
Abstract

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