Abstract
Genetic variation contributes significantly to brain function and dysfunction, and studying the genetic factors responsible for neurological phenotypes is tremendously valuable for understanding brain development, physiology, and pathophysiology, as well as for advancements in disease diagnostics and therapeutics. Many genetic determinants of neurobiology are inherited from parents through the germline and are present in all cells of an individual, but others, known as somatic or mosaic mutations, may be acquired post-conception and are therefore present in only a subset of an individual’s cells. While the relationship between somatic mutation and cancer is clear, recent studies have also established a role for somatic mutations in several non-malignant neurological diseases of childhood, including cerebral cortical malformations and epilepsy disorders, autism spectrum disorder, and other neuropsychiatric diseases.