In 1991, an interdisciplinary research project was launched by the Institute for Neurophysiology together with the Institute for Translation and Interpretation of the University of Vienna in an attempt to study the brain mechanisms involved in simultaneous interpreting (SI). The method of choice was the EEG, which was expected to yield some valuable insights into the mental processes underlying activities involving complex verbal thinking. This paper sums up some of the relevant findings obtained. It discusses brain and language, EEG mapping and other issues.