Dizziness when changing body position may indicate the development of dementia. This is the conclusion reached by scientists after years of analysis of data on more than two thousand older people.

Orthostatic collapse, the so-called similar condition appears due to the sharp decrease in blood pressure. With a sharp rise or, on the contrary, when a person sits down, the blood does not have time to go to the brain. This can lead to the darkening of the eyes, and even fainting.

Such a violation of vascular tone occurs most often in adolescents and older people, for the latter it is fraught with the risk of developing cardiovascular disease and early death.

according to the journal Neurology, Lori roach, University of California, San Francisco colleagues have suggested that orthostatic collapse can also indicate the risk of dementia. Scientists have collected data on 2131 compatriot at the age of 73 years, who at the beginning of the study of this disease was not.

over the next five years, the researchers checked to see if the volunteers orthostatic collapse. If participants in the experiment the pressure is suddenly decreased during at least a third of all examinations, it was concluded about the presence of orthostatic collapse. There were identified 15 percent.

For the 12 years of observation dementia was diagnosed almost 22 percent of subjects. Moreover, participants with frequent orthostatic collapse risk of disease was 40 percent higher than the rest.

the Scientists decided that sudden changes in pressure during the change of position of a body is a signal of future development of dementia.