brain lateralization

This shows the endocast of the human brain

Researchers were not right about left brains

Brain imprints on cranial bones from humans and great apes refute the long-standing belief that the human pattern of brain asymmetry is unique. Researchers noted similar patterns of asymmetry in our great ape ancestors. However, there was more variability in this pattern in humans. Findings suggest lateralized and uniquely human cognitive abilities, such as language, evolved by adapting an ancestral brain asymmetry pattern.... Read More...
This shows left hands

Genes associated with left-handedness linked with shape of the brain’s language regions

Four genetic regions have been identified as playing a role in left-handedness. Three of the four genes were associated with proteins involved in brain development and structure. Neuroimaging revealed those who were left-handed had increased functional connectivity between left and right language networks. Researchers also found correlations between the genetic regions associated with left-handedness and slightly reduced Parkinson's risk, but a slightly increased risk for schizophrenia.... Read More...