Disorganized eye head coordination in Alzheimer's disease

Agnosies visualles is a characteristic early stage symptom of Alzheimer's disease, which is a primary degenerative disease, and has been named the disease of the century. Elucidation of the mechanism of this symptom, which causes a dysfunction in the posterior association cortex at the center of the parietal lobe, is important for the understanding of the pathophysiology of Alzheimer's disease. So the authors investigated eye and head movements, using newly developed technology. The results showed that in Alzheimer's disease, there is little head movement compared to eye movement, and there seems to be a general dysfunction in the disorganized coordination system. And these results indicate a problem in the coordinate axes, confusion in the input information, abnormality in the integration, and a disorder in the parallel processing mechanism.