The left and right hemispheres of the brain are each responsible for specific functions, like, for example, language, which is processed in the left hemisphere for most of the adult population. Although researchers have known about this asymmetry since the 19th century, its biological origin remains a mystery. A new exploratory whole‐genome‐sequencing study based on the rare (roughly 1% of the population) rightward hemispheric language dominance (RHLD) reveals that strongly penetrant, rare genetic mutations might sometimes be involved in this phenomenon. The work is published in Genes, Brain and Behavior.
Read the research paper: Genome sequencing for rightward hemispheric language dominance. Carrion-Castillo A, Van der Haegen L, Tzourio-Mazoyer N, Kavaklioglu T, Badillo S, Chavent M, Saracco J, Brysbaert M, Fisher SE, Mazoyer B, Francks C. Genes Brain Behav. doi: 10.1111/gbb.12572. [Epub ahead of print]