Aging

Latest news

  • A large study adds to evidence that caffeine helps older women fight cognitive impairment and dementia.
  • This is supported by two animal studies showing precisely how caffeine is valuable for keeping the brain healthy.

Data from the Women's Health Initiative Memory Study, involving 6,467 postmenopausal women (65+) who reported some level of caffeine consumption, has found that those who consumed above average amounts of coffee had a lower risk of developing dementia.

  • A small study adds to evidence that walking improves memory in older adults, and indicates that this is particularly helpful for memory tasks the seniors find challenging.

A small study that fitted 29 young adults (18-31) and 31 older adults (55-82) with a device that recorded steps taken and the vigor and speed with which they were made, has found that those older adults with a higher step rate performed better on memory tasks than those who were more sedentary.

  • A small study shows significant changes in brain activity among older adults engaged in learning a cognitively demanding skill.

A study involving 39 older adults has found that those randomly assigned to a “high-challenge” group showed improved cognitive performance and more efficient brain activity compared with those assigned to a low-challenge group, or a control group.

  • A large study in which older adults underwent various types of cognitive training has found that less-educated adults benefited more from training designed to speed processing.

Data from 2,800 participants (aged 65+) in the Advanced Cognitive Training for Independent and Vital Elderly (ACTIVE) study has revealed that one type of cognitive training benefits less-educated people more than it does the more-educated.

  • B vitamins can help many older adults with mild cognitive impairment, but only if they have good levels of omega-3 fatty acids.

A study involving 266 people with mild cognitive impairment (aged 70+) has found that B vitamins are more effective in slowing cognitive decline when people have higher omega 3 levels.

  • A longitudinal study confirms findings from cross-sectional studies that certain common viral infections are factors in age-related cognitive decline.

Growing research has implicated infections as a factor in age-related cognitive decline, but these have been cross-sectional (comparing different individuals, who will have a number of other, possibly confounding, attributes).

  • The Mediterranean diet is the diet most associated with cognitive and health benefits in older adults.
  • A new study has found larger brain volumes among those following this sort of diet, equivalent to that of brains five years younger.
  • Much of this was associated with two components of the diet in particular: eating fish regularly, and eating less meat.

Another study adds to the growing evidence that a Mediterranean diet is good for the aging brain.

  • On average, older adults with low levels of vitamin D showed much faster decline in episodic memory and executive function.
  • Older adults with dementia had significantly lower levels of vitamin D compared to those with MCI or normal cognition.
  • Low vitamin D was more common in African-Americans and Hispanics, compared to whites.

A study involving 382 older adults (average age 75) followed for around five years, has found that those who don’t get enough vitamin D may experience cognitive decline at a much faster rate than people who have adequate vitamin D.

Idiosyncratic brain activity among older people watching a thriller-type movie adds to evidence that:

  • age may affect the ability to perceive and remember the order of events (explaining why older adults may find it harder to follow complex plots)
  • age affects the ability to focus attention and not be distracted
  • age affects the brain's connectivity — how well connected regions work together.

A study involving 218 participants aged 18-88 has looked at the effects of age on the brain activity of participants viewing an edited version of a 1961 Hitchcock TV episode (given that participants viewed the movie while in a MRI machine, the 25 minute episode was condensed to 8 minutes).

  • A correlation has been found between physical activity in healthy older adults and more variable resting-state brain activity.
  • More variable resting-state activity in older adults has previously been linked to better cognition.
  • No such correlation was found between cardiorespiratory fitness and resting-state brain activity.
  • The finding supports previous evidence linking higher levels of physical activity in old age with better cognition and brain health.

A study involving 100 healthy older adults (aged 60-80) has found that those with higher levels of physical activity showed more variable spontaneous brain activity in certain brain regions (including the

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