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Brain iron levels associated with healthy cognitive development

Society for Neuroscience

brain

Iron levels in brain tissue rise during development and are correlated with cognitive abilities, according to recently published research.

FAB RESEARCH COMMENT:

Brain cells need iron for healthy development and function.

It has long been known that a lack of dietary iron during pregnancy and early life can permanently impair brain development and function, and low iron levels have been linked with ADHD and related behaviour and learning difficulties, as well as with other disorders of movement and cognition. 

In this new study, brain imaging showed not only that brain iron levels increase from childhood into young adulthood, but that low brain iron in a particular brain region (the basal ganglia - a dopamine-rich region involved in movement, attention and impulse control) was associated with poorer cognitive performance across a range of tests.

For details of the underlying research, see:
See here for more articles on iron and cognition.

Iron levels in brain tissue rise during development and are correlated with cognitive abilities, according to research in children and young adults recently published in JNeurosci. Future work could lead to iron supplementation as an intervention for atypical cognitive development.

Brain cells stay healthy in part by storing iron. It is most concentrated in the basal ganglia, a brain region that filters incoming information from moment to moment and suggests the best action to take. Low iron in the basal ganglia during early life is linked to cognitive impairment, yet we don't know how iron levels change during typical development.

Larsen et al. examined brain iron levels through magnetic resonance imaging brain scans from the Philadelphia Neurodevelopmental Cohort, a dataset of scans from over 1500 children and young adults ranging from age eight to twenty-four.

The research team found that brain iron levels in the basal ganglia steadily increase throughout development and, in two subregions, continue to increase into adulthood. Decreased brain iron in one subregion, the putamen, was correlated with impaired performance on cognitive tasks involving reasoning and spatial processing, suggesting that brain iron is needed for healthy cognitive development.