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Genetics Linked to Intelligence Through Brain Neurite Density

11/14/2025

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Summary

Story summary

A study published in the Cerebral Cortex shows that genetic differences influence general intelligence through neurite density in brain connections.
Researchers found that individuals with higher genetic scores for intelligence had greater neurite density, correlating with better cognitive performance.
Using advanced neuroimaging, researchers assessed white matter properties in over 500 young adults.
They concluded neurite density, not myelination or alignment, is a key factor in intelligence and called for replication.

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Story summary

A study published in the Cerebral Cortex shows that genetic differences influence general intelligence through neurite density in brain connections.
Researchers found that individuals with higher genetic scores for intelligence had greater neurite density, correlating with better cognitive performance.
Using advanced neuroimaging, researchers assessed white matter properties in over 500 young adults.
They concluded neurite density, not myelination or alignment, is a key factor in intelligence and called for replication.