Narcoleptic and schizophrenic hallucinations

The differential diagnosis of narcolepsy versus schizophrenia is sometimes complicated by similar phenomenology, particularly when hallucinations predominate. REM sleep disturbances seem fundamental in the pathophysiology of narcolepsy, and REM sleep intrusions during periods of wakefulness are often associated with hallucinations also in healthy controls and in patients with other brain disorders including schizophrenia. This study used a semistructured interview to investigate different aspects of hallucinations (frequency, modality, content, and dependence on body posture) in 148 patients with narcolepsy, 21 patients with acute exacerbation of a schizophrenic disorder, and 128 healthy su…