A significant advancement in knowledge of the link between cognition and genetics has been made thanks to a study led by Université de Montréal graduate students Guillaume Huguet and Thomas Renne, working under the supervision of medical geneticist Sébastien Jacquemont, an associate professor of pediatrics and a researcher at the UdeM-affiliated CHU Saint-Justine.

Published in Cell Genomics, the research explored how the copy number variation, or CNV, of certain DNA segments can influence cognitive abilities.

Analyzing the CNV of nearly 260,000 people in the general population, the scientists were able to compare each individual’s CNV and cognition to define a reference model—a kind of “map” of the effects of CNV on cognition, such as the intelligence quotient and memory—and to establish links between these CNVs and achievements within the brain, as well as in other organs and tissues.