1. Laboratoire de Neurobiologie des Reseaux Sensorimoteurs, CNRS, ESA 7060, 45 rue des Saints‐Peres, 75270 Paris cedex 06, France
2. Eye and Ear Research Unit, Royal Prince Alfred Hospital, Missenden Road, Camperdown, NSW 2050, Australia
3. Vestibular Research Laboratory, Department of Psychology, University of Sydney, NSW 2006