Under the title The Coordination and Regulation of Movements, an English language version of six of the most important papers of the Russian physiologist Nicholas Bernstein was published in 1967 (Pergamon Press Ltd.). That work has been out of print for some years, but in view of the frequency of its citation in recent works on movement control, a republication was considered desirable. However, since some of the papers in the first edition were written in the 1930's, it was felt that readers' interests would be better served if, after each chapter, an evaluation of the work and, where necessary, an update of the data in the light of more recent findings was included. Contributors of international renown provide such chapters.