Victor Horsley Department of Neurosurgery, The National Hospital for Neurology and Neurosurgery, Queen Square, Box 32, London, WC1N 3BG, UK. jopalasz@gmail.com. Victor Horsley Department of Neurosurgery, The National Hospital for Neurology and Neurosurgery, Queen Square, Box 32, London, WC1N 3BG, UK. UCL Queen Square Institute of Neurology, London, UK. Royal Free Hospital, Pond St, Hampstead, London, UK.