"Uncovering the Genetic Link to Left-Handedness"

A new study has identified rare genetic variants of the TUBB4B gene that are 2.7 times more common in left-handed individuals, shedding light on the genetic component of left-handedness. These variants may play a role in the development of brain asymmetry that determines dominant hand. The findings, based on genetic data from over 350,000 adults, suggest that microtubules controlled by TUBB4B are involved in setting up the brain's normal asymmetries. The study also suggests a potential link between genes involved in brain asymmetry and psychiatric traits, such as schizophrenia and autism.