Plant-Based Diets Are Linked To Lower Dementia Risk — But Only The Right Kind (M)
Researchers found that some plant-based diets were linked to lower dementia risk, while others were not.
Category: Dementia
This High-Dose Vaccine Is Linked To 55% Lower Alzheimer’s Risk (M)
Older adults who received this high-dose vaccine showed a reduced risk of Alzheimer’s disease.
The Simple Home Habit That Reverses Mild Cognitive Impairment
People with mild cognitive impairment may go on to develop dementia, but some people never get worse and others can improve.
People with mild cognitive impairment may go on to develop dementia, but some people never get worse and others can improve.
Doing crossword puzzles helps improve the thinking skills of seniors with mild cognitive impairment.
By contrast, computer-based cognitive training failed to deliver the same benefits.
Mild cognitive impairment (MCI) is worse than the usual decline of memory and thinking skills with age, but is not full-blown dementia.
People with MCI may go on to develop dementia, but some people never get worse and others can improve.
Professor D.P. Devanand, the study’s first author, said:
“This is the first study to document both short-term and longer-term benefits for home-based crossword puzzles training compared to another intervention.
The results are important in light of the difficulty in showing improvement with interventions in mild cognitive impairment.”
For the study, 107 people with mild cognitive impairment either did crossword puzzles or cognitive games training for three months.
An 18-month follow-up revealed that those who did crossword puzzles showed sustained improvements in their cognitive skills.
Meanwhile, performance declined for participants in the cognitive games group.
People who did the crossword puzzles also maintained more of their abilities to carry out daily tasks, such as preparing meals, paying bills and remembering appointments.
Brain shrinkage was also reduced in the group that did crossword puzzles.
Professor Devanand said:
“The benefits were seen not only in cognition but also in daily activities with indications of brain shrinkage on MRI that suggests that the effects are clinically meaningful.”
The researchers found that crossword puzzles were superior for participants who were at a later stage of the disease.
Professor Murali Doraiswamy, study co-author, said:
“The trifecta of improving cognition, function and neuroprotection is the Holy Grail for the field.
Further research to scale brain training as a home-based digital therapeutic for delaying Alzheimer’s should be a priority for the field.”
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The study was published in the journal NEJM Evidence (Devanand et al., 2022).
This Breakfast Staple Could Lower Alzheimer’s Risk By 27% (M)
It is a familiar food, but the latest evidence is prompting researchers to take a much closer look at its neurological effects.
The Best Sleep Position For Clearing The Brain of Waste
On your side, face-up or face-down? The position which best clears metabolic waste from your brain at night.
On your side, face-up or face-down? The position which best clears metabolic waste from your brain at night.
Sleeping on your side removes waste from the brain most efficiently.
As a result, sleeping on your side may help reduce the risk of Alzheimer’s and other neurological diseases.
Professor Maiken Nedergaard, one of the study’s authors, said:
“It is interesting that the lateral sleep position is already the most popular in human and most animals — even in the wild — and it appears that we have adapted the lateral sleep position to most efficiently clear our brain of the metabolic waste products that built up while we are awake.
The study therefore adds further support to the concept that sleep subserves a distinct biological function of sleep and that is to ‘clean up’ the mess that accumulates while we are awake.
Many types of dementia are linked to sleep disturbances, including difficulties in falling asleep.
It is increasing acknowledged that these sleep disturbances may accelerate memory loss in Alzheimer’s disease.
Our finding brings new insight into this topic by showing it is also important what position you sleep in.”
Nightly clean-up
The study of mice tested the brain’s ‘clean-up’ mechanism in three different sleeping positions:
- On the side,
- face-down,
- and face-up.
Scientists monitored how cerebrospinal fluid (CSF) flowed through the brain and exchanged with interstitial fluid.
This pathway — called the glymphatic pathway — clears waste from the brain most efficiently at night.
Professor Helene Benveniste, another of the study’s authors, said:
“The analysis showed us consistently that glymphatic transport was most efficient in the lateral position when compared to the supine or prone positions.
Because of this finding, we propose that the body posture and sleep quality should be considered when standardizing future diagnostic imaging procedures to assess CSF-ISF transport in humans and therefore the assessment of the clearance of damaging brain proteins that may contribute to or cause brain diseases.”
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- 10 Science-Backed Ways To Slash Your Dementia Risk Today (P)
- 12 Proven Ways To Prevent Memory Loss As You Age (P)
The research was published in the Journal of Neuroscience (Lee et al., 2015).
Pets Slow Age-Related Cognitive Decline – May Reduce Dementia Risk
Pet owners retain their cognitive abilities better with age than those without pets.
Pet owners retain their cognitive abilities better with age than those without pets.
Having a pet may slow the rate of cognitive decline.
Older people who have pets such as a cat or a dog, especially for longer than five years, demonstrate better cognitive health.
This may put pet owners at a lower risk of developing dementia.
The benefit could be down to an increase in people’s physical activity as well as the stress-reducing effects of animals.
Dr Tiffany Braley, study co-author, said:
“Prior studies have suggested that the human-animal bond may have health benefits like decreasing blood pressure and stress.
Our results suggest pet ownership may also be protective against cognitive decline.”
The study included almost 1,400 older people, half of whom owned pets, with one-third owning pets over the long-term.
They were given a series of cognitive tests, including of their ability to remember words and do simple arithmetic.
The results revealed that pet owners retained their cognitive abilities better with age than people without pets.
The longer people had owned a pet, the greater the cognitive benefit.
Dr Braley said:
“As stress can negatively affect cognitive function, the potential stress-buffering effects of pet ownership could provide a plausible reason for our findings.
A companion animal can also increase physical activity, which could benefit cognitive health.
That said, more research is needed to confirm our results and identify underlying mechanisms for this association.”
Pets and mental health
Pets have been linked to all sorts of mental health benefits, both in the short- and long-term.
For example, ten minutes spent petting a cat or dog can significantly reduce stress.
And petting a dog for as little as three minutes increases levels of oxytocin, sometimes known as the ‘love hormone’.
In the longer term, people living with mental illness report a range of benefits from having pets:
- People reported finding pets calming and supportive.
- People felt their pets could tell when they were in trouble.
- Pets provided a distraction from upsetting symptoms of mental illness.
- Pets helped people stay active by providing a stimulus.
- Pets helped people maintain a positive identity.
- Owners felt their pets accepted them without judgement.
Having a dog as a childhood pet can even decrease the risk of developing schizophrenia later in life.
Emotional support animals can also be beneficial to people with mental health problems, another study finds.
Depression, anxiety and loneliness were reduced over a year in people who were given a cat or dog as a companion.
The study was presented at the American Academy of Neurology’s 74th Annual Meeting (Shieu et al., 2022).
Cognitive Decline Linked To Seasoning That 90% Overconsume (M)
90% use too much of an everyday substance that can cause inflammation of blood vessels in the brain, which is linked to dementia.
This Sleep Pattern Is Tied To Higher Dementia Risk (M)
Sleep disturbance is common in dementia, but the reason is unclear.
The Personality Trait Linked To 43% Lower Dementia Risk 43% (M)
People highest in this trait were significantly less likely to develop dementia over 14 years.
This Everyday Nutrient Could Influence Alzheimer’s Before It Begins (M)
Higher levels of this vitamin in midlife may give protection against dementia years later.
