This book is a collection of papers given by invited speakers at a Symposium on 'Feedback and Motor Control', held at the University of Glasgow from July 10th to 13th 1984, which was attended by over 200 scientists from 20 countries. The Symposium was the Fourth International Symposium organised by the Scottish Electrophysiological Society (SES), and on this occasion the SES joined forces with the Society for Experimental Biology (SEB), so that the Symposium was held dur ing the annual Summer Meeting of the SEB. A policy of the SES since its formation in 1970 has been to promote dialogue between scientists working on invertebrate and vertebrate nervous systems by hol