Macpherson's definition of hallucinations
   In 1899 the Australian psychiatrist John Macpherson (b. 1861) defined hallucinations as follows: "Hallucination may... be defined as a morbid phenomenon, the result of dissociated cerebral action, by means of which a perception that has no objective basis or reality is subjectively perceived by the conscious mind, and projected externally."
   References
   Macpherson, J. (1899). Mental affections: An introduction to the study ofinsanity. London: Macmillan and Co.

Dictionary of Hallucinations. . 2010.

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