Over the past few semesters a group of neurologists, neurophysiologists, and brain theorists in various departments of Tlibingen University have gathered periodically in an effort to review ideas and evidence on cerebel lar functions. At times, general solutions seemed close, when credit was given to various theoretical proposals advanced since the early days of cer ebellar physiology, however, it became clear in every case that a large part of the available facts refused to submit to the general ideas. As believers in the power of scientific discussion, we felt that the time was ripe for...