Fig. 1.

Psychotic features in patients with PD and healthy controls. The bar chart illustrates the distribution of several modalities of psychotic manifestations in healthy controls and patients with PD. In healthy subjects, auditory disturbances were more frequent followed by minor psychotic phenomena, visual and olfactory hallucinations. In the PD group, there was a predominance of passage hallucinations followed by auditory phenomena, illusions and formed visual hallucinations, olfactory and tactile abnormalities, delusional ideation and, finally, sense of presence. The presence of passage hallucinations and illusions was significantly higher in patients with PD, compared to healthy individuals.