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.
Most 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.
In 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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Resistance Beyond Weights
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Resistance, Your Way
We’ve talked before about the importance of resistance training:
Resistance Is Useful! (Especially As We Get Older)
And we’ve even talked about how to make resistance training more effective:
(High Intensity Interval Training, but make it High Intensity Resistance Training)
Which resistance training exercises are best?
There are two reasonable correct answers here:
- The resistance training exercises that you will actually do (because it’s no good knowing the best exercise ever if you’re not going to do it because it is in some way offputting to you)
- The resistance training exercises that will prevent you from getting a broken bone in the event of some accident or incident
This latter is interesting, because when people think resistance training, the usually immediate go-to exercises are often things like the bench press, or the chest machine in the gym.
But ask yourself: how often do we hear about some friend or relative who in their old age has broken their humerus?
It can happen, for sure, but it’s not as often as breaking a hip, a tarsal (ankle bones), or a carpal (wrist bones).
So, how can we train to make those bones strong?
Strong bones grow under strong muscles
When archaeologists dig up a skeleton from a thousand years ago, one of the occupations that’s easy to recognize is an archer. Why?
An archer has an unusual frequent exercise: pushing with their left arm while pulling with their right arm. This will strengthen different muscles on each side, and thus, increase bone density in different places on each arm. The left first metacarpal and right first and second metacarpals and phalanges are also a giveaway.
This is because: one cannot grow strong muscles on weak bones (or else the muscles would just break the bones), so training muscles will force the body to strengthen the relevant bones.
So: if you want strong bones, train the muscles attached to those bones
This answers the question of “how am I supposed to exercise my hips” etc.
Weights, bodyweight, resistance bands
If you go to the gym, there’s a machine for everything, and a member of gym staff will be able to advise which of their machines will strengthen which muscles.
If you train with free weights at home:
- Wrist curls (forearm supported and stationary, lifting a dumbbell in your hand, palm-upwards) will strengthen the wrist
- The farmer’s walk (carrying a heavy weight in each hand) will also strengthen your wrist
- A modified version of this involves holding the weight with just your fingertips, and then raising and lowering it by curling and uncurling your fingers)
- Lateral leg raises (you will need ankle-weights for this) will strengthen your ankles and your hips, as will hip abductions (as in today’s featured video), especially with a weight attached.
- Ankle raises (going up on your tip-toes and down again, repeat) while holding weights in your hands will strengthen your ankles
If you don’t like weights:
- Press-ups will strengthen your wrists
- Fingertip press-ups are even better: to do these, do your press-ups as normal, except that the only parts of your hands in contact with the ground are your fingertips
- This same exercise can be done the other way around, by doing pull-ups
- And that same “even better” works by doing pull-ups, but holding the bar only with one’s fingertips, and curling one’s fingers to raise oneself up
- Lateral leg raises and hip abductions can be done with a resistance band instead of with weights. The great thing about these is that whereas weights are a fixed weight, resistance bands will always provide the right amount of resistance (because if it’s too easy, you just raise your leg further until it becomes difficult again, since the resistance offered is proportional to how much tension the band is under).
Remember, resistance training is still resistance training even if “all” you’re resisting is gravity!
If it fells like work, then it’s working
As for the rest of preparing to get older?
Check out:
Training Mobility Ready For Later Life
Take care!
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Cordyceps: Friend Or Foe?
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Cordyceps: friend or foe?
Cordyceps is a famously frightening fungus. It’s the one responsible for “zombie ants” and other zombie creatures, and it’s the basis for the existential threat to humanity in the TV show The Last of Us.
It’s a parasitic fungus that controls the central and peripheral nervous systems of its host, slowly replacing the host’s body, as well as growing distinctive spines that erupt out of the host’s body. Taking over motor functions, it compels the host to do two main things, which are to eat more food, and climb to a position that will be good to release spores from.
Fortunately, none of that matters to humans. Cordyceps does not (unlike in the TV show) affect humans that way.
What does Cordyceps do in humans?
Cordyceps (in various strains) is enjoyed as a health supplement, based on a long history of use in Traditional Chinese Medicine, and nowadays it’s coming under a scientific spotlight too.
The main health claims for it are:
- Against inflammation
- Against aging
- Against cancer
- For blood sugar management
- For heart health
- For exercise performance
Sounds great! What does the science say?
There’s a lot more science for the first three (which are all closely related to each other, and often overlapping in mechanism and effect).
So let’s take a look:
Against inflammation
The science looks promising for this, but studies so far have either been in vitro (cell cultures in petri dishes), or else murine in vivo (mouse studies), for example:
- Anti-inflammatory effects of Cordyceps mycelium in murine macrophages
- Cordyceps sinensis as an immunomodulatory agent
- Immunomodulatory functions of extracts from Cordyceps cicadae
- Cordyceps pruinosa inhibits in vitro and in vivo inflammatory mediators
In summary: we can see that it has anti-inflammatory properties for mice and in the lab; we’d love to see the results of studies done on humans, though. Also, while it has anti-inflammatory properties, it performed less well than commonly-prescribed anti-inflammatory drugs, for example:
❝C. militaris can modulate airway inflammation in asthma, but it is less effective than prednisolone or montelukast.❞
Against aging
Because examining the anti-aging effects of a substance requires measuring lifespans and repeating the experiment, anti-aging studies do not tend to be done on humans, because they would take lifetimes to perform. To this end, it’s inconvenient, but not a criticism of Cordyceps, that studies have been either mouse studies (short lifespan, mammals like us) or fruit fly studies (very short lifespan, genetically surprisingly similar to us).
The studies have had positive results, with typical lifespan extensions of 15–20%:
- The lifespan-extending effect of Cordyceps sinensis in normal mice
- Cordyceps sinensis oral liquid prolongs the lifespan of the fruit fly, Drosophila melanogaster
- Anti-aging activity of polysaccharides from Cordyceps militaris
- Anti-aging effect of Cordyceps sinensis extract
Against cancer
Once again, the studies here have been in vitro, or murine in vivo. They do look good though:
In vitro (human cell cultures in a lab):
In vivo (mouse studies):
Summary of these is: Cordyceps quite reliably inhibits tumor growth in vitro (human cell cultures) and in vivo (mouse studies). However, trials in human cancer patients are so far conspicuous by their absence.
For blood sugar management
Cordyceps appears to mimic the action of insulin, without triggering insulin sensitivity. For example:
The anti-hyperglycemic activity of the fruiting body of Cordyceps in diabetic rats
There were some other rat/mouse studies with similar results. No studies in humans yet.
For heart health
Cordyceps contains adenosine. You may remember that caffeine owes part of its stimulant effect to blocking adenosine, the hormone that makes us feel sleepy. So in this way, Cordyceps partially does the opposite of what caffeine does, and may be useful against arrhythmia:
Cardiovascular protection of Cordyceps sinensis act partially via adenosine receptors
For exercise performance
A small (30 elderly participants) study found that Cordyceps supplementation improved VO2 max by 7% over the course of six weeks:
However, another small study (22 young athletes) failed to reproduce those results:
Cordyceps Sinensis supplementation does not improve endurance exercise performance
In summary…
Cordyceps almost certainly has anti-inflammation, anti-aging, and anti-cancer benefits.
Cordyceps may have other benefits too, but the evidence is thinner on the ground for those, so far.
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The Blood Sugar Solution – by Dr. Mark Hyman
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The main purpose of this book is combating metabolic disease, the amalgam of what’s often prediabetes (sometimes fully-fledged diabetes) and cardiovascular disease (sometimes fully-fledged heart disease).
To achieve this (after an introductory section explaining what the sociomedical problems are and why the sociomedical problems are happening), he offers a seven-step program; we’ll not keep those steps a mystery; they are:
- Boost your nutrition
- Regulate your hormones
- Reduce inflammation
- Improve your digestion
- Maximize detoxification
- Enhance energy metabolism
- Soothe your mind
Thereafter, it’s all about leading the reader by the hand through the steps; he also offers a six-week action plan, and a six-week meal plan with recipes.
The style is very sensationalist (too sensationalist for this reviewer’s personal taste) but nevertheless backed up with hard science when it comes to hard claims. So, if you don’t mind wading through (or skipping) some early chapters that are a bit “used car salesman” in feel, there’s actually a lot of good information, especially in the middle of the book, and useful practical guides in the middle and end.
Bottom line: if you want a good comprehensive science-based practical guide to addressing the risk of metabolic disease, this is that.
Click here to check out The Blood Sugar Solution, and look after yours!
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Feta Cheese vs Mozzarella – Which is Healthier?
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Our Verdict
When comparing feta to mozzarella, we picked the mozzarella.
Why?
There are possible arguments for both, but there are a couple of factors that we think tip the balance.
In terms of macronutrients, feta has more fat, of which, more saturated fat, and more cholesterol. Meanwhile, mozzarella has about twice the protein, which is substantial for a cheese. So this section’s a fair win for mozzarella.
In the category of vitamins, however, feta wins with more of vitamins B1, B2, B3, B6, B9, B12, D, & E. In contrast, mozzarella boasts only a little more vitamin A and choline. An easy win for feta in this section.
When it comes to minerals, the matter is decided, we say. Mozzarella has more calcium, magnesium, phosphorus, and potassium, while feta has more copper, iron, and (which counts against it) sodium. A win for mozzarella.
About that sodium… A cup of mozzarella contains about 3% of the RDA of sodium, while a cup of feta contains about 120% of the RDA of sodium. You see the problem? So, while mozzarella was already winning based on adding up the previous categories, the sodium content alone is a reason to choose mozzarella for your salad rather than feta.
That settles it, but just before we close, we’ll mention that they do both have great gut-healthy properties, containing healthy probiotics.
In short: if it weren’t for the difference in sodium content, this would be a narrow win for mozzarella. As it is, however, it’s a clear win.
Want to learn more?
You might like to read:
- Making Friends With Your Gut (You Can Thank Us Later)
- Is Dairy Scary? ← the answer is “it can be, but it depends on the product, and some are healthy; the key is in knowing which”
- How Too Much Salt May Lead To Organ Failure
Take care!
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Corn Chips vs Potato Chips: Which is Healthier?
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Our Verdict
When comparing corn chips to potato chips, we picked the corn chips.
Why?
First, let it be said, this was definitely a case of “lesser evil voting” as there was no healthy choice here. But as for which is relatively least unhealthy…
Most of the macronutrient and micronutrient profile is quite similar. Both foods are high carb, moderately high fat, negligible protein, and contain some trace minerals and even some tiny amounts of vitamins. Both are unhealthily salty.
Exact numbers will of course vary from one brand’s product to another, but you can see some indicative aggregate scores here in the USDA’s “FoodData Central” database:
The biggest health-related difference that doesn’t have something to balance it out is that the glycemic index of corn chips averages around 63, whereas the glycemic index of potato chips averages around 70 (that is worse).
That’s enough to just about tip the scales in favor of corn chips.
The decision thus having been made in favor of corn chips (and the next information not having been part of that decision), we’ll mention one circumstantial extra benefit to corn chips:
Corn chips are usually eaten with some kind of dip (e.g. guacamole, sour cream, tomato salsa, etc) which can thus deliver actual nutrients. Potato chips meanwhile are generally eaten with no additional nutrients. So while we can’t claim the dip as being part of the nutritional make-up of the corn chips, we can say:
If you’re going to have a habit of eating one or the other, then corn chips are probably the least unhealthy of the two.
And yes, getting vegetables (e.g. in the dips) in ways that are not typically associated with “healthy eating” is still better than not getting vegetables at all!
Check out: Level-Up Your Fiber Intake! (Without Difficulty Or Discomfort)
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52 Weeks to Better Mental Health – by Dr. Tina Tessina
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We’ve written before about the health benefits of journaling, but how to get started, and how to make it a habit, and what even to write about?
Dr. Tessina presents a year’s worth of journaling prompts with explanations and exercises, and no, they’re not your standard CBT flowchart things, either. Rather, they not only prompt genuine introspection, but also are crafted to be consistently uplifting—yes, even if you are usually the most disinclined to such positivity, and approach such exercises with cynicism.
There’s an element of guidance beyond that, too, and as such, this book is as much a therapist-in-a-book as you might find. Of course, no book can ever replace a competent and compatible therapist, but then, competent and compatible therapists are often harder to find and can’t usually be ordered for a few dollars with next-day shipping.
Bottom line: if undertaken with seriousness, this book will be an excellent investment in your mental health and general wellbeing.
Click here to check out 52 Weeks to Better Mental Health, and get on the best path for you!
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