CAUSES FOR FORMATION OF VISUAL-SPATIAL PERCEPTION IN PARKINSON'S DISEASE
Along with other non-motor manifestations of the disease, the problem of visual-spatial disorders in Parkinson's disease has recently attracted the attention of many researchers in connection with the undoubted influence of these symptoms on the quality of life of patients. In most cases, there is difficulty in recognizing and copying drawings, impaired spatial orientation, psychotic symptoms affecting visual-spatial perception (visual illusions and hallucinations), averaging from 16 to 37%. At the same time, today there is no single algorithm for both clinical and instrumental diagnostics of visual-spatial disorders in patients with Parkinson's disease. It should also be noted that among the most unfavorable non-motor manifestations of Parkinson's disease, a special place is occupied by cognitive impairments, progressing to dementia. At the same time, these manifestations of neuropsychological deficit have a number of predictors that do not manifest themselves as a direct impairment of cognitive functions. In this regard, an important aspect is the fact that the visual-spatial deficit manifests itself to the greatest extent in patients with Parkinson's disease with dementia. An important factor is the presence of a direct relationship between memory, attention and visual-spatial perception, which explains the possible cumulative impairment of these functions during degeneration of certain areas of the cerebral cortex. At the same time, a number of studies have shown that impaired visual-spatial perception in combination with moderately pronounced cognitive impairments are predictors of dementia in PD. Thus, the study of the features of visual-spatial impairment in Parkinson's disease is an urgent task of modern neurology.