During the academic year 1984/85 a study group on "Per- ception and Action" was established at the Center for Inter- disciplinary Research of the University of Bielefeld. Among the various activities of this group was a series of symposia. This volume covers the proceedings of one of the sym- posia, held in October 1984 and entitled "Generation and Modulation of Action Patterns". Bringing together scientists from diverse disciplines in gen- eral is challenging, but also hazardous. Aware of the notori- ous communication problems, it was tried to keep the number of representatives of at least...