Despite decades of research, we do not definitively know how people sometimes see things that are not there. Eight models of complex visual hallucinations have been published since 2000, including Deafferentation, Reality Monitoring, Perception and Attention Deficit, Activation, Input, and Modulation, Hodological, Attentional Networks, Active Inference, and Thalamocortical Dysrhythmia Default...
Visual hallucinations (VH) in Parkinson's disease (PD) are a chronic complication in 30 to 60% of treated patients and have a multifaceted phenomenology. Flickering, faultive impressions, and illusionary misperceptions precede the core syndrome of stereotyped, colorful images. The patient variably recognizes these images as hallucinations, being rarely irritated or frightened and more often...
Visual hallucinations (VH) are seen in about a third of all patients with Parkinson's disease (PD) and are usually considered to be an early marker or clinical component of a dopaminergic psychosis. Their peculiar phenomenology has not yet been studied in a systematic manner. A semi-structured interview was performed twice in 62 PD patients. Different motoric and cognitive disease scales were...