The cases discussed in this book are drawn from people who were seen by the author in her clinical practice or research, or are based on published cases in medical journals. In the case of the author’s patients, their names and identifying features have been changed to protect their anonymity. Some cases are an amalgamation of published case studies, and for some of these the author has created fictional life stories to emphasise that these are not just medical subjects, but people with complex personal lives. In all cases, however, the details about neurological conditions and the associated sexual changes are entirely factual.