The hallucination: A disorder of brain and mind

This paper reviews our knowledge concering the neurobiological foundations of hallucinations. It discusses organic visual and auditory hallucinations and focuses specifically on auditory-verbal hallucinations ("hearing voices ") in schizophrenia, Relying on evidence from functional neuroimaging studi es with SPECT, PET, fMRT and MEG, a model is proposed that assumes that a d isorder of internal monitoring of inner speech is crucially involved in the pathogenesis of auditory-verbal-hallucinations.