Experimental study of hallucinations as they occur

September 4, 2008 A hallucination is a perception in a conscious awake state, in the absence of external stimuli, that has qualities of real perception in that they are vivid, substantial, and located in external objective space. For most of us, hallucinations are a normal, fleeting, brain glitch; yet for a few they are persistent, distressing and associated with a range of psychiatric, neurological and eye conditions. In the September Issue of Cortex, Dominic H. ffytche at the Institute of Psychiatry in London reviews what we do know and moves the field forward, by introducing a new experimental approach to studying hallucinations as they occur.

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