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Iron deficiency in infancy and neurocognitive functioning at 19 years: evidence of long-term deficits in executive

Angela F Lukowski1, Marlene Koss, Matthew J Burden

  • 1Department of Psychology and Social Behavior, University of California, Irvine, California 92697, USA. angela.lukowski@uci.edu

Nutritional Neuroscience
|April 22, 2010
PubMed

Insights

Infant iron deficiency can lead to lasting cognitive deficits in adults, affecting executive functions and memory. These impairments may stem from early impacts on the brain's dopamine system and hippocampus.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Nutritional Science

Background:

  • Infant iron deficiency is linked to neurodevelopmental issues.
  • Early iron deficiency in rodents affects the hippocampus and dopamine system.
  • Long-term cognitive effects of infant iron deficiency are not fully understood.

Purpose of the Study:

  • To investigate long-term neurocognitive deficits in adults with a history of infant iron deficiency.
  • To assess performance on tasks measuring frontostriatal and hippocampal functions.

Main Methods:

  • Neurocognitive testing in adults with and without a history of severe infant iron deficiency.
  • Utilized tests assessing executive functions (e.g., Trail Making Test) and memory (e.g., Pattern Recognition Memory).

Main Results:

  • Adults with infant iron deficiency showed poorer performance on frontostriatal executive functions, including inhibitory control, set-shifting, and planning.
  • Impairments were also observed in hippocampus-based recognition memory tasks.
  • These deficits persisted despite iron therapy.

Conclusions:

  • Chronic, severe infant iron deficiency is associated with persistent deficits in executive function and recognition memory in adulthood.
  • Potential mechanisms include long-term effects on the dopamine system, hippocampus, and their interaction.
  • Early nutritional interventions are crucial for optimal brain development.

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