Dominic H. ffytche a1 a1 Institute of Psychiatry, De Crespigny Park, London SE5 8AF, United Kingdom
d.ffytche@iop.kcl.ac.uk
Abstract
When viewed from a distance, visual hallucinations fall into one of two symptom patterns, a dichotomy which poses a problem for theoretical models treating them as a single entity. Such models should be broadened to allow for two distinct but overlapping syndromes – one likely to relate to visual de-afferentation, the other to Perception and Attention Deficit (PAD) cholinergic pathology.
