Sarah Medland is a psychiatric and statistical geneticist working on neuroimaging genetics and mental health. She was instrumental in the formation of the ENIGMA brain imaging consortium, and chairs the genetic working group within this consortium. Medland’s work has significantly advanced our understanding of the ways that genetics influences the structure and function of the human brain. She discovered that there are many genetic variants of small effect size that affect the morphology of the brain and that many of these variants also influence risk for developing psychiatric and neurological disorders.