Peter Thier is Professor of Neurology and Chairman of the Department of Cognitive Neurology at the Center for Neurology and Hertie Institute for Clinical Brain Research as well as chairman of the interdisciplinary Werner Reichardt Center of Integrative Neuroscience at Tübingen University. His current research and associated clinical interests (in brackets) include the roles of joint attention and action understanding for social interactions (impaired social interactions, e.g. in autism), the cerebellar basis of motor learning and cerebellar contributions to cognition (functional consequences of cerebellar disease), brain mechanisms warranting perceptual stability during ego-motion and distinction between ‘self’ and ‘non-self’ (non-vestibular dizziness, disturbances of agency in schizophrenia) and transformations in sensorimotor coordination and the role of cerebro-cerebellar communication (spatial disorientation, motor disturbances).