 Heisenberg's work has focused on the neurogenetics of Drosophila (the fruit fly), with the aim of investigating the genetic foundations of the Drosophila brain by studying the effect of genetic mutations on brain function.In addition, Heisenberg contributed a number of essays on the topics of science in society, perception, as well as the question of the freedom of the will.He was elected as a member of the Leopoldina in 1989.