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Descriptions of hallucinatory phenomena have figured prominently since the beginning of recorded history. Jean Etienne Esquirol (1772-1840) is usually credited for having introduced the term in 1817, differentiating between hallucinations and illusions. Both are wrong perceptions, but in illusions, an external stimulus is always present whereas hallucinations are perceptions that occur in the absence of corresponding sensory stimuli. They occur in a variety of conditions but more often in the mentally ill, especially in schizophrenia where hallucinations, particularly auditory hallucinations represent for many, such as Henri Ey one of the cardinal features. This chapter, however, deals with visual hallucinations as found in individuals who are not necessarily mentally ill: the Charles Bonnet syndrome and autoscopy., (© 2018 S. Karger AG, Basel.)

Thomas Mann (1875-1955) is considered one of the most influential writers of the late nineteenth and early twentieth century. In addition to his novels and essays, he was well known for his criticisms of the Nazi party, and particularly against the racial nationalism promoted by Adolf Hitler after the First World War, as well as for his depiction of diseases. Here, we provide a quick sketch of Mann's life and his relationship with nineteenth to twentieth century German society. We then proceed to describe how Mann became interested in diseases, how he used the diseases as metaphors, and his specific contribution to the field of neurology. We describe some of the neurological cases portrayed in Mann's work, and particularly epilepsy described in The Buddenbrooks, Felix Krull and The Magic Mountain, meningitis, neurosyphilis and migraines depicted in Doctor Faustus, and essential tremor described in The Magic Mountain and Doctor Faustus. We conclude with reflections about Mann's interest in diseases and particularly in neurology., (© 2018 S. Karger AG, Basel.)