Whereas some older adults show significant cognitive deficits, others perform as well as young adults. We investigated the neural basis of these different aging patterns using positron emission tomography (PET). In PET and functional MRI (fMRI) studies, prefrontal cortex (PFC) activity tends to be less asymmetric in older than in younger adults (Hemispheric Asymmetry Reduction in Old Adults or ...

Fifteen older adults (M = 68 years old) and 15 young adults (M = 23 years old) participated in a speed-accuracy task in which aiming movements were performed on a digitizing tablet to assess movement slowing and variability in older adults. Target-size and movement amplitude influences were analyzed separately to determine if they affected the performance of the young and older adults different...

The older population in the world especially in Iran is growing. According to census the number of individuals aged is approaching5/07 million In 2006 the nation is bracing for the aging of baby boom generation in 20 next year, which will swell the 65 and older population to10 million By 2020 and 26 million by 2050. (Iran census, 2006) this population trends ported increased demand for health c...