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  1. M Elena Garralda
  1. Correspondence to Professor M Elena Garralda, Academic Child Psychiatry, Imperial College London, St Mary's Campus, Norfolk Place, London W2 1 PG, UK; e.garralda{at}

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Answers to the questions from page 237

1. Hypnagogic hallucinations in a well-adjusted 12-year-old boy

The hallucinations occur exclusively when he is about to get into sleep; this is characteristic of hypnagogic hallucinations, which are not indicative of a medical or psychiatric disorder. Nightmares by way of contrast occur during sleep, they are unpleasant vivid dreams that cause a strong emotional response, and sufferers tend to wake up in a state of anxiety.

2. Acute illness related delirium

The closeness in time between this boy's illness and withdrawal of …

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