Old age may begin much earlier than thought if you believe age is defined by mental functions. According to new research conducted at the University of Virginia and published in the Neurobiology of Aging many cognitive functions demonstrate peak performance at age 22. By age 27 some cognitive functioning begins to decline while others such as memory decline around 37.
This study was conducted using standardized cognitive tests on 2,000 men and women aged 18-60 years of age and covered nearly seven years. Participants were in good health and well educated.
Aging involves multiple factors and change does not infer disorder. These results, however, further support the idea of a proactive brain health lifestyle that includes cognitive work outs (see fitbrains.com) that begin in childhood.