Enjoy Bitter Foods For Your Heart & Brain
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When Bitter Is Better
A good general rule of thumb for “does this food contain a lot of healthy polyphenols?” is:
“is this (edible) plant bitter/astringent/pungent”?
If it is, it’s probably rich in polyphenols:
Deciphering the role of bitter and astringent polyphenols in promoting well-being
…which is why it’s no surprise that black coffee and bitter chocolate score highly, as do hot peppers and even garlic.
See also: Our Top 5 Spices: How Much Is Enough For Benefits?
Even fruits, generally considered something sweet to eat, often contain more polyphenols when they are bitter—many berries are great examples of this!
Read more: Goji Berries: Which Benefits Do They Really Have?
You can read more about the science of this here:
Sensory Nutrition and Bitterness and Astringency of Polyphenols
Important for multiple reasons (including heart and brain health)
Polyphenols have many benefits, and they’re most well known for their heart-healthy properties, but their antioxidant effect (and other mechanisms) also means these foods are generally neuroprotectants too:
The science of this is not all as obvious as you might think!
It is reasonable to expect “ok, this has antioxidant effect, so it will reduce oxidative damage to brain cells too”, and while that is true (and yes, polyphenols do cross the blood-brain barrier), they also help in other ways, including through the gut:
What if I don’t like bitter/astringent/pungent foods?
If you do not have a medical condition that proscribes them (do check with your doctor if unsure), the best advice is to simply eat them anyway, and your tastes will adapt.
It will also help if you avoid sweet foods (though this too is also a good general rule of thumb!), as this will move the balance of where your brain’s “set range” is for “good taste”.
Bonus tip: dark chocolate (80%+ cocoa if possible, 95% if you can get it) and chilli peppers go great with each other. Here’s an example of a chilli chocolate product on Amazon; it’s 70% cocoa (which is not bad, but could be better). You might be able to get a higher percentage locally, especially if you ask your local chocolatière, or make it yourself!
Enjoy!
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Reishi Mushrooms: Which Benefits Do They Really Have?
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Reishi Mushrooms
Another Monday Research Review, another mushroom! If we keep this up, we’ll have to rename it “Mushroom Monday”.
But, there’s so much room for things to say, and these are fun guys to write about, as we check the science for any spore’ious claims…
Why do people take reishi?
Popular health claims for the reishi mushroom include:
- Immune health
- Cardiovascular health
- Protection against cancer
- Antioxidant qualities
- Reduced fatigue and anxiety
And does the science agree?
Let’s take a look, claim by claim:
Immune health
A lot of research for this has been in vitro (ie, with cell cultures in labs), but promising, for example:
Immunomodulating Effect of Ganoderma lucidum (Lingzhi) and Possible Mechanism
(that is the botanical name for reishi, and the Chinese name for it, by the way)
That’s not to say there are no human studies though; here it was found to boost T-cell production in stressed athletes:
Cardiovascular health
Here we found a stack of evidence for statistically insignificant improvements in assorted measures of cardiovascular health, and some studies where reishi did not outperform placebo.
Because the studies were really not that compelling, instead of taking up room (and your time) with them, we’re going to move onto more compelling, exciting science, such as…
Protection against cancer
There’s a lot of high quality research for this, and a lot of good results. The body of evidence here is so large that even back as far as 2005, the question was no longer “does it work” or even “how does it work”, but rather “we need more clinical studies to find the best doses”. Researchers even added:
❝At present, lingzhi is a health food supplement to support cancer patients, yet the evidence supporting the potential of direct in vivo anticancer effects should not be underestimated.❞
Check it out:
Anticancer effects of Ganoderma lucidum: a review of scientific evidence
Just so you know we’re not kidding about the weight of evidence, let’s drop a few extra sources:
- Ganoderma lucidum: a rational pharmacological approach to surmount cancer
- Ganoderma lucidum as an anti-cancer agent
- Extract from Ganoderma lucidum suppresses cervical cancer cell malignancy
- Ganoderma lucidum spore oil induces apoptosis of breast cancer cells
- Ganoderma lucidum enhances carboplatin chemotherapy effect
- Ganoderma lucidum inhibits prostate cancer cell migration
- Ganoderma lucidum fruiting body extracts inhibit colorectal cancer
- Inhibitory activity of medicinal mushroom Ganoderma lucidum on colorectal cancer
- Ganoderma lucidum (reishi mushroom) for cancer treatment
By the way, we shortened most of those titles for brevity, but almost all of the continued with “by” followed by a one-liner of how it does it.
So it’s not a “mysterious action” thing, it’s a “this is a very potent medicine and we know how it works” thing.
Antioxidant qualities
Here we literally only found studies to say no change was found, one that found a slight increase of antioxidant levels in urine. It’s worth noting that levels of a given thing (or its metabolites, in the case of some things) in urine are often quite unhelpful regards knowing what’s going on in the body, because we get to measure only what the body lost, not what it gained/kept.
So again, let’s press on:
Reduced fatigue and anxiety
Most of the studies for this that we could find pertained to health-related quality of life for cancer patients specifically, so (while they universally give glowing reports of reishi’s benefits to health and happiness of cancer patients), that’s a confounding factor when it comes to isolating its effects on reduction of fatigue and anxiety in people without cancer.
Here’s one that looked at it in the case of reduction of fatigue, anxiety, and other factors, in patients without cancer (but with neurathenia), in which they found it was “significantly superior to placebo with respect to the clinical improvement of symptoms”.
Summary:
- Reishi mushroom’s anti-cancer properties are very, very clear
- There is also good science to back immune health claims
- It also has been found to significantly reduce fatigue and anxiety in unwell patients (we’d love to see more studies on its benefits in otherwise healthy people, though)
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Their First Baby Came With Medical Debt. These Illinois Parents Won’t Have Another.
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JACKSONVILLE, Ill. — Heather Crivilare was a month from her due date when she was rushed to an operating room for an emergency cesarean section.
The first-time mother, a high school teacher in rural Illinois, had developed high blood pressure, a sometimes life-threatening condition in pregnancy that prompted doctors to hospitalize her. Then Crivilare’s blood pressure spiked, and the baby’s heart rate dropped. “It was terrifying,” Crivilare said.
She gave birth to a healthy daughter. What followed, though, was another ordeal: thousands of dollars in medical debt that sent Crivilare and her husband scrambling for nearly a year to keep collectors at bay.
The Crivilares would eventually get on nine payment plans as they juggled close to $5,000 in bills.
“It really felt like a full-time job some days,” Crivilare recalled. “Getting the baby down to sleep and then getting on the phone. I’d set up one payment plan, and then a new bill would come that afternoon. And I’d have to set up another one.”
Crivilare’s pregnancy may have been more dramatic than most. But for millions of new parents, medical debt is now as much a hallmark of having children as long nights and dirty diapers.
About 12% of the 100 million U.S. adults with health care debt attribute at least some of it to pregnancy or childbirth, according to a KFF poll.
These people are more likely to report they’ve had to take on extra work, change their living situation, or make other sacrifices.
Overall, women between 18 and 35 who have had a baby in the past year and a half are twice as likely to have medical debt as women of the same age who haven’t given birth recently, other KFF research conducted for this project found.
“You feel bad for the patient because you know that they want the best for their pregnancy,” said Eilean Attwood, a Rhode Island OB-GYN who said she routinely sees pregnant women anxious about going into debt.
“So often, they may be coming to the office or the hospital with preexisting debt from school, from other financial pressures of starting adult life,” Attwood said. “They are having to make real choices, and what those real choices may entail can include the choice to not get certain services or medications or what may be needed for the care of themselves or their fetus.”
Best-Laid Plans
Crivilare and her husband, Andrew, also a teacher, anticipated some of the costs.
The young couple settled in Jacksonville, in part because the farming community less than two hours north of St. Louis was the kind of place two public school teachers could afford a house. They saved aggressively. They bought life insurance.
And before Crivilare got pregnant in 2021, they enrolled in the most robust health insurance plan they could, paying higher premiums to minimize their deductible and out-of-pocket costs.
Then, two months before their baby was due, Crivilare learned she had developed preeclampsia. Her pregnancy would no longer be routine. Crivilare was put on blood pressure medication, and doctors at the local hospital recommended bed rest at a larger medical center in Springfield, about 35 miles away.
“I remember thinking when they insisted that I ride an ambulance from Jacksonville to Springfield … ‘I’m never going to financially recover from this,’” she said. “‘But I want my baby to be OK.’”
For weeks, Crivilare remained in the hospital alone as covid protocols limited visitors. Meanwhile, doctors steadily upped her medications while monitoring the fetus. It was, she said, “the scariest month of my life.”
Fear turned to relief after her daughter, Rita, was born. The baby was small and had to spend nearly two weeks in the neonatal intensive care unit. But there were no complications. “We were incredibly lucky,” Crivilare said.
When she and Rita finally came home, a stack of medical bills awaited. One was already past due.
Crivilare rushed to set up payment plans with the hospitals in Jacksonville and Springfield, as well as the anesthesiologist, the surgeon, and the labs. Some providers demanded hundreds of dollars a month. Some settled for monthly payments of $20 or $25. Some pushed Crivilare to apply for new credit cards to pay the bills.
“It was a blur of just being on the phone constantly with all the different people collecting money,” she recalled. “That was a nightmare.”
Big Bills, Big Consequences
The Crivilares’ bills weren’t unusual. Parents with private health coverage now face on average more than $3,000 in medical bills related to a pregnancy and childbirth that aren’t covered by insurance, researchers at the University of Michigan found.
Out-of-pocket costs are even higher for families with a newborn who needs to stay in a neonatal ICU, averaging $5,000. And for 1 in 11 of these families, medical bills related to pregnancy and childbirth exceed $10,000, the researchers found.
“This forces very difficult trade-offs for families,” said Michelle Moniz, a University of Michigan OB-GYN who worked on the study. “Even though they have insurance, they still have these very high bills.”
Nationwide polls suggest millions of these families end up in debt, with sometimes devastating consequences.
About three-quarters of U.S. adults with debt related to pregnancy or childbirth have cut spending on food, clothing, or other essentials, KFF polling found.
About half have put off buying a home or delayed their own or their children’s education.
These burdens have spurred calls to limit what families must pay out-of-pocket for medical care related to pregnancy and childbirth.
In Massachusetts, state Sen. Cindy Friedman has proposed legislation to exempt all these bills from copays, deductibles, and other cost sharing. This would parallel federal rules that require health plans to cover recommended preventive services like annual physicals without cost sharing for patients. “We want … healthy children, and that starts with healthy mothers,” Friedman said. Massachusetts health insurers have warned the proposal will raise costs, but an independent state analysis estimated the bill would add only $1.24 to monthly insurance premiums.
Tough Lessons
For her part, Crivilare said she wishes new parents could catch their breath before paying down medical debt.
“No one is in the right frame of mind to deal with that when they have a new baby,” she said, noting that college graduates get such a break. “When I graduated with my college degree, it was like: ‘Hey, new adult, it’s going to take you six months to kind of figure out your life, so we’ll give you this six-month grace period before your student loans kick in and you can get a job.’”
Rita is now 2. The family scraped by on their payment plans, retiring the medical debt within a year, with help from Crivilare’s side job selling resources for teachers online.
But they are now back in debt, after Rita’s recurrent ear infections required surgery last year, leaving the family with thousands of dollars in new medical bills.
Crivilare said the stress has made her think twice about seeing a doctor, even for Rita. And, she added, she and her husband have decided their family is complete.
“It’s not for us to have another child,” she said. “I just hope that we can put some of these big bills behind us and give [Rita] the life that we want to give her.”
About This Project
“Diagnosis: Debt” is a reporting partnership between KFF Health News and NPR exploring the scale, impact, and causes of medical debt in America.
The series draws on original polling by KFF, court records, federal data on hospital finances, contracts obtained through public records requests, data on international health systems, and a yearlong investigation into the financial assistance and collection policies of more than 500 hospitals across the country.
Additional research was conducted by the Urban Institute, which analyzed credit bureau and other demographic data on poverty, race, and health status for KFF Health News to explore where medical debt is concentrated in the U.S. and what factors are associated with high debt levels.
The JPMorgan Chase Institute analyzed records from a sampling of Chase credit card holders to look at how customers’ balances may be affected by major medical expenses. And the CED Project, a Denver nonprofit, worked with KFF Health News on a survey of its clients to explore links between medical debt and housing instability.
KFF Health News journalists worked with KFF public opinion researchers to design and analyze the “KFF Health Care Debt Survey.” The survey was conducted Feb. 25 through March 20, 2022, online and via telephone, in English and Spanish, among a nationally representative sample of 2,375 U.S. adults, including 1,292 adults with current health care debt and 382 adults who had health care debt in the past five years. The margin of sampling error is plus or minus 3 percentage points for the full sample and 3 percentage points for those with current debt. For results based on subgroups, the margin of sampling error may be higher.
Reporters from KFF Health News and NPR also conducted hundreds of interviews with patients across the country; spoke with physicians, health industry leaders, consumer advocates, debt lawyers, and researchers; and reviewed scores of studies and surveys about medical debt.
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.
Subscribe to KFF Health News’ free Morning Briefing.
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Delicious Daily Daal
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You’re not obliged to eat this every day, but you might want to. The reason we called this one this, is because it’s a super simple recipe (don’t be put off by the long ingredients list; it’s mostly spices making it look long) which, after you’ve done it a couple of times, you could practically do it in your sleep quickly and easily.
The name “lentil daal” is a bit like “naan bread”—a redundant tautology repeated more than once unnecessarily, but it helps for international clarity. The dish is usually served with naan, by the way, and rice. We don’t have room for those today, maybe we’ll do them another day; for now, you can just cook rice how you normally do, and buy naan if necessary.
Writer’s note: I love strong flavors; many people don’t. For this reason I’m going to give a “basic” version. Please feel free to multiply the spices if you feel so inclined. Where I give “one teaspoon” of a spice below, I’d use a tablespoon at home. Chili peppers can vary in heat a lot even within the same type, so what I do for any given batch is taste one (raw), judge the heat, and use an appropriate number of peppers accordingly. If you don’t want to do that, I suggest just guessing low (as per the instructions below) and if you find at the end you want more heat, you can always stir in a little hot sauce. I know that sounds heretical, but at the end of the day, the primary goal of cooking is to have the meal you want at the end of it.
You will need
- 1 1/2 cups red lentils
- 1 large onion, chopped
- 1 large bulb garlic, minced
- 1 oz ginger, grated
- 2 hot peppers (e.g. serrano), chopped
- 1 tsp ground cumin
- 1 tsp ground coriander
- 1 tsp ground turmeric
- 1 tsp garam masala (this is also ground, but it doesn’t come any other way)
- 1 tsp chili flakes (omit if you’re not a fan of heat)
- 2 tsp cracked black pepper
- 1 tsp salt ← I wouldn’t recommend multiplying this one unless later, to taste. In fact, instead of 1 tsp salt I use 2 tsp MSG, which has less sodium than 1 tsp salt. But “1 tsp salt” is the “easy to find in the store” version.
- 2 large or 3 small tomatoes, chopped (or 1 can chopped tomatoes)
- 2 shallots, thinly sliced
- 1 tsp cumin seeds
- 1 tsp mustard seeds
- 1 tsp coriander seeds
- 1 tsp black peppercorns
- 1 lime
- 1/2 cup fresh cilantro, or if you have the “that tastes like soap” gene, parsley, chopped
- Coconut oil for cooking (if you don’t like coconut, consider springing for avocado oil—if you use olive oil, it’ll add an olivey taste which changes the dish a lot; not inherently bad, but it feels a lot less like traditional daal; seed oils are less healthy and we don’t recommend them; ghee is a traditional option and not bad in moderation, but not as healthy as the oils we mentioned first)
- Water for cooking the lentils
Method
(we suggest you read everything at least once before doing anything)
1) In a saucepan, boil water and add the lentils; let them simmer while doing the next things.
2) Sauté the onions until translucent. This should only take a few minutes.
3) Add the garlic, ginger, and hot peppers, and keep stirring for another couple of minutes.
4) Add the ground spices (cumin, coriander, turmeric, garam masala) chili flakes, and cracked black pepper, as well as the salt or MSG if using (not both), and stir them in quickly but thoroughly.
For the next step, you may need to transfer to larger pan if your sauté pan isn’t big enough to take the volume; if so, that’s fine, the sauté has done its job and can have a rest now. If your sauté pan is big enough, just carry on in the same pan; this is perfect.
5) Add the lentils with the water you cooked them in (there might not be much water left now, as the lentils will have absorbed a lot of it; this is fine) as well as the chopped tomatoes.
6) Simmer until it has the consistency of a very thick sauce (you can add a splash more water here and there if it seems to need more). In the West it’s common to serve lentils “al dente”, but in the East it’s usual to (for dishes like this) cook them until they start to
7) Add the juice of at least 1/2 of your lime, or the whole lime if you feel so inclined.
8) In a pre-heated skillet, flash-fry the sliced shallots and the seeds (cumin, coriander, mustard, black peppercorns) at the hottest temperature you can muster. Don’t worry if the oil smokes; we’re only going to be at this tadka-making stage for a moment and nothing will stick provided you keep it moving. When the seeds start popping, it’s ready. Add it all to the big pan and stir in.
9) Add the cilantro-or-parsley garnish once you’re ready to serve.
Enjoy!
Learn more
For those interested in some of the science of what we have going on today:
- Why You’re Probably Not Getting Enough Fiber (And How To Fix It)
- How Much Spice Is Right?
- Tasty Polyphenols
Take care!
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How To Unfatty A Fatty Liver
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How To Unfatty A Fatty Liver
In Greek mythology, Prometheus suffered the punishment of being chained to a rock, where he would have his liver eaten by an eagle, whereupon each day his liver would grow back, only to be eaten again the next day.
We mere humans who are not Greek gods might not be able to endure quite such punishment to our liver, but it is an incredibly resilient and self-regenerative organ.
In fact, provided at least 51% of the liver is still present and correct, the other 49% will regrow. Similarly, damage done (such as by trying to store too much fat there due to metabolic problems, as in alcoholic or non-alcoholic fatty liver disease) will reverse itself in time, given the chance.
The difference between us and Prometheus
In the myth, Prometheus had his liver regrow overnight every night. Ours don’t recover quite so quickly.
Indeed, the science has good and bad news for us:
❝Liver recolonization models have demonstrated that hepatocytes have an unlimited regenerative capacity. However, in normal liver, cell turnover is very slow.❞
~ Michalopoulos and Bhusan (2020)
Read more: Liver regeneration: biological and pathological mechanisms and implications
If it regenerates, why do people need transplants, and/or die of liver disease?
There are some diseases of the liver that inhibit its regenerative abilities, or (as in the case of cancer) abuse them to our detriment. However, in the case of fatty liver disease, the reason is usually simple:
If the lifestyle factors that caused the liver to become fatty are still there, then its regenerative abilities won’t be able to keep up with the damage that is still being done.
Can we speed it up at all?
Yes! The first and most important thing is to minimize how much ongoing harm you are still doing to it, though.
- If you drink alcohol, stop. According to the WHO, the only amount of alcohol that is safe for you is zero.
- You might like our previous article: How To Reduce Or Quit Alcohol
- Consider your medications, and find out which place a strain on the liver. Many medications are not optional; you’re taking them for an important reason, so don’t quit things without checking with your doctor. Medications that strain the liver include, but are by no means limited to:
- Many painkillers, including acetaminophen/paracetamol (e.g. Tylenol), and ibuprofen
- Some immunosuppresent drugs, including azathioprine
- Some epilepsy drugs, including phenytoin
- Some antibiotics, including amoxicillin
- Statins in general
Note: we are not pharmacists, nor doctors, let alone your doctors.
Check with yours about what is important for you to take, and what alternatives might be safe for you to consider.
Dietary considerations
While there are still things we don’t know about the cause(s) of non-alcoholic fatty liver disease, there is a very strong association with a diet that is:
- high in salt
- high in refined carbohydrates
- e.g. white flour and white flour products such as white bread and white pasta; also the other main refined carbohydrate: sugar
- high in red meat
- high in non-fermented dairy
- high in fried foods.
So, consider minimizing those, and instead getting plenty of fiber, and plenty of lean protein (not from red meat, but poultry and fish are fine iff not fried; beans and legumes are top-tier, though).
Also, hydrate. Most people are dehydrated most of the time, and that’s bad for all parts of the body, and the liver is no exception. It can’t regenerate if it’s running on empty!
Read more: Foods To Include (And Avoid) In A Healthy Liver Diet
How long will it take to heal?
In the case of alcoholic fatty liver disease, it should start healing a few days after stopping drinking. Then, how long it takes to fully recover depends on the extent of the damage; it could be weeks or months. In extreme cases, years, but that is rare. Usually if the damage is that severe, a transplant is needed.
In the case of non-alcoholic fatty liver disease, again it depends on the extent of the damage, but it is usually a quicker recovery than the alcoholic kind—especially if eating a Mediterranean diet.
Read more: How Long Does It Take For Your Liver To Repair Itself?
Take good care of yourself!
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- If you drink alcohol, stop. According to the WHO, the only amount of alcohol that is safe for you is zero.
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Are Brain Chips Safe?
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Ready For Cyborgization?
In yesterday’s newsletter, we asked you for your views on Brain-Computer Interfaces (BCIs), such as the Utah Array and Neuralink’s chips on/in brains that allow direct communication between brains and computers, so that (for example) a paralysed person can use a device to communicate, or manipulate a prosthetic limb or two.
We didn’t get as many votes as usual; it’s possible that yesterday’s newsletter ended up in a lot of spam filters due to repeated use of a word in “extra ______ olive oil” in its main feature!
However, of the answers we did get…
- About 54% said “It’s bad enough that our phones spy on us, without BCI monitoring our thoughts as well!”
- About 23% said “Sounds great in principle, but I don’t think we’re there yet safetywise”
- About 19% said “Sign me up for technological telepathy! I am ready for assimilation”
- One (1) person said “Electrode outside the skull are good; chips on the brain are bad”
But what does the science say?
We’re not there yet safetywise: True or False?
True, in our opinion, when it comes to the latest implants, anyway. While it’s very difficult to prove a negative (it could be that everything goes perfectly in human trials), “extraordinary claims require extraordinary evidence”, and so far this seems to be lacking.
The stage before human trials is usually animal trials, starting with small creatures and working up to non-human primates if appropriate, before finally humans.
- Good news: the latest hot-topic BCI device (Neuralink) was tested on animals!
- Bad news: to say it did not go well would be an understatement
The Gruesome Story of How Neuralink’s Monkeys Actually Died
The above is a Wired article, and we tend to go for more objective sources, however we chose this one because it links to very many objective sources, including an open letter from the Physicians’ Committee for Responsible Medicine, which basically confirms everything in the Wired article. There are lots of links to primary (medical and legal) sources, too.
Electrodes outside the skull are good; chips on/in the brain are bad: True or False?
True or False depending on how they’re done. The Utah Array (an older BCI implant, now 20 years old, though it’s been updated many times since) has had a good safety record, after being used by a few dozen people with paralysis to control devices:
How the Utah Array is advancing BCI science
The Utah Array works on the same general principle as Neuralink, but the mechanics of its implementation are very different:
- The Utah Array involves a tiny bundle of microelectrodes (held together by a rigid structure that looks a bit like a nanoscale hairbrush) put in place by a brain surgeon, and that’s that.
- The Neuralink has a dynamic web of electrodes, implanted by a little robot that acts like a tiny sewing machine to implant many polymer threads, each containing its own a bunch of electrodes.
In theory, the latter is much more advanced. In practice, so far, the former has a much better safety record.
I am right to be a little worried about giving companies access to my brain: True or False?
True or False, depending on the nature of your concern.
For privacy: current BCI devices have quite simple switches operated consciously by the user. So while technically any such device that then runs its data through Bluetooth or WiFi could be hacked, this risk is no greater than using a wireless mouse and/or keyboard, because it has access to about the same amount of information.
For safety: yes, probably there is cause to be worried. Likely the first waves of commercial users of any given BCI device will be severely disabled people who are more likely to waive their rights in the hope of a life-changing assistance device, and likely some of those will suffer if things go wrong.
Which on the one hand, is their gamble to make. And on the other hand, makes rushing to human trials, for companies that do that, a little more predatory.
Take care!
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We created a VR tool to test brain function. It could one day help diagnose dementia
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If you or a loved one have noticed changes in your memory or thinking as you’ve grown older, this could reflect typical changes that occur with ageing. In some cases though, it might suggest something more, such as the onset of dementia.
The best thing to do if you have concerns is to make an appointment with your GP, who will probably run some tests. Assessment is important because if there is something more going on, early diagnosis can enable prompt access to the right interventions, supports and care.
But current methods of dementia screening have limitations, and testing can be daunting for patients.
Our research suggests virtual reality (VR) could be a useful cognitive screening tool, and mitigate some of the challenges associated with current testing methods, opening up the possibility it may one day play a role in dementia diagnosis.
Where current testing is falling short
If someone is worried about their memory and thinking, their GP might ask them to complete a series of quick tasks that check things like the ability to follow simple instructions, basic arithmetic, memory and orientation.
These sorts of screening tools are really good at confirming cognitive problems that may already be very apparent. But commonly used screening tests are not always so good at detecting early and more subtle difficulties with memory and thinking, meaning such changes could be missed until they get worse.
A clinical neuropsychological assessment is better equipped to detect early changes. This involves a comprehensive review of a patient’s personal and medical history, and detailed assessment of cognitive functions, including attention, language, memory, executive functioning, mood factors and more. However, this can be costly and the testing can take several hours.
Testing is also somewhat removed from everyday experience, not directly tapping into activities of daily living.
Enter virtual reality
VR technology uses computer-generated environments to create immersive experiences that feel like real life. While VR is often used for entertainment, it has increasingly found applications in health care, including in rehabilitation and falls prevention.
Using VR for cognitive screening is still a new area. VR-based cognitive tests generally create a scenario such as shopping at a supermarket or driving around a city to ascertain how a person would perform in these situations.
Notably, they engage various senses and cognitive processes such as sight, sound and spatial awareness in immersive ways. All this may reveal subtle impairments which can be missed by standard methods.
VR assessments are also often more engaging and enjoyable, potentially reducing anxiety for those who may feel uneasy in traditional testing environments, and improving compliance compared to standard assessments.
Millions of people around the world have dementia.
pikselstock/ShutterstockMost studies of VR-based cognitive tests have explored their capacity to pick up impairments in spatial memory (the ability to remember where something is located and how to get there), and the results have been promising.
Given VR’s potential for assisting with diagnosis of cognitive impairment and dementia remains largely untapped, our team developed an online computerised game (referred to as semi-immersive VR) to see how well a person can remember, recall and complete everyday tasks. In our VR game, which lasts about 20 minutes, the user role plays a waiter in a cafe and receives a score on their performance.
To assess its potential, we enlisted more than 140 people to play the game and provide feedback. The results of this research are published across three recent papers.
Testing our VR tool
In our most recently published study, we wanted to verify the accuracy and sensitivity of our VR game to assess cognitive abilities.
We compared our test to an existing screening tool (called the TICS-M) in more than 130 adults. We found our VR task was able to capture meaningful aspects of cognitive function, including recalling food items and spatial memory.
We also found younger adults performed better in the game than older adults, which echoes the pattern commonly seen in regular memory tests.
Adults of a range of ages tried our computerised game.
pikselstock/ShutterstockIn a separate study, we followed ten adults aged over 65 while they completed the game, and interviewed them afterwards. We wanted to understand how this group – who the tool would target – perceived the task.
These seniors told us they found the game user-friendly and believed it was a promising tool for screening memory. They described the game as engaging and immersive, expressing enthusiasm to continue playing. They didn’t find the task created anxiety.
For a third study, we spoke to seven health-care professionals about the tool. Overall they gave positive feedback, and noted its dynamic approach to age-old diagnostic challenges.
However, they did flag some concerns and potential barriers to implementing this sort of tool. These included resource constraints in clinical practice (such as time and space to carry out the assessment) and whether it would be accessible for people with limited technological skills. There was also some scepticism about whether the tool would be an accurate method to assist with dementia diagnosis.
While our initial research suggests this tool could be a promising way to assess cognitive performance, this is not the same as diagnosing dementia. To improve the test’s ability to accurately detect those who likely have dementia, we’ll need to make it more specific for that purpose, and carry out further research to validate its effectiveness.
We’ll be conducting more testing of the game soon. Anyone interested in giving it a go to help with our research can register on our team’s website.
Joyce Siette, Research Theme Fellow in Health and Wellbeing, Western Sydney University and Paul Strutt, Senior Lecturer in Psychology, Western Sydney University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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