1. Department of Prosthetic Dentistry and Stomatognathic Physiology, Royal Dental College, University of Aarhus, DK–8000 Aarhus
2. Center for Sensory-Motor Interaction, Aalborg University DK-9220 Aalborg, Denmark, Departments of
3. Neurophysiology Research Laboratories, Veterans Administration Medical Center, Ann Arbor, MI 40105, USA
4. Neurology
5. Physiology, University of Michigan, Ann Arbor, MI 48109,