Cognitive changes
Cognitive function is an important human experience which differs between individuals. Furthermore, cognitive function includes ability of memory, perception, judgment, perceptual speed, spatial manipulation and reasoning. However, the most common of cognitive impairment in elderly is memory decline which is the first considered in clinical practice. Evidence supports that both cross sectional and longitudinal studies have shown that different cognitive abilities have different developmental trajectories across the lifespan. Thus the cognitive impairment is one of the health problems in elderly which is also related to decreasing of quality of life and inducing an abnormal ability to perform daily activities in elderly
Moreover, the cognitive impairment may progress to dementia which affects in economic burden related to the condition. Importantly, the elderly with cognitive impairment is commonly associated with lower performance on cognitive tasks