Problem

Cognitive decline

Other Names:
Diminishing mental capacity with age
Deterioration of the mind with age
Decline in cognitive ability with ageing
Nature:

The brain changes with age: it loses about 10% of weight and some large nerve cells wither. Brain scans also show different brain patterns in younger and older people. Different regions of the brains of old people are also less well connected with each other. Such physical changes appear to be related to loss of cognitive and intellectual abilities in the aged, the most obvious being memory.

Background:

Some studies have linked high blood pressure to mental decline, while other research suggests that keeping blood pressure under control wards off mental deterioration. Either way, maintaining a healthy flow of blood and oxygen protects the brain. There is some evidence that exercise might be able to offset some of the mental decline often associated with the aging process, sharpening memory and certain other mental abilities.

Incidence:

In a US study of more than 400 people aged 45 to 103, a little more than half were considered to have mild cognitive impairment while the rest had no memory problems. Some of those with mild memory problems also had signs of other difficulty with judgement, problem solving or with personal care, which are typically seen with Alzheimer's disease. Over the 5-year observation period, only 7% of people with no memory problems went on to develop full-blown dementia. In contrast, 20% to 61% of those with mild cognitive impairment developed dementia, depending on the severity of symptoms at the beginning of the study. Of 25 of those who died, an autopsy of brain tissue showed that 24 had a dementing disorder, including 21 cases of Alzheimer's disease.

Narrower Problems:
Dementia
Age-related memory loss
Related UN Sustainable Development Goals:
GOAL 3: Good Health and Well-beingGOAL 10: Reduced Inequality
Problem Type:
E: Emanations of other problems
Date of last update
03.02.2020 – 03:31 CET