‘Noisy’ autistic brains seem better at certain tasks. Here’s why neuroaffirmative research matters
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Pratik Raul, University of Canberra; Jeroen van Boxtel, University of Canberra, and Jovana Acevska, University of Canberra
Autism is a neurodevelopmental difference associated with specific experiences and characteristics.
For decades, autism research has focused on behavioural, cognitive, social and communication difficulties. These studies highlighted how autistic people face issues with everyday tasks that allistic (meaning non-autistic) people do not. Some difficulties may include recognising emotions or social cues.
But some research, including our own study, has explored specific advantages in autism. Studies have shown that in some cognitive tasks, autistic people perform better than allistic people. Autistic people may have greater success in identifying a simple shape embedded within a more complex design, arranging blocks of different shapes and colours, or spotting an object within a cluttered visual environment (similar to Where’s Wally?). Such enhanced performance has been recorded in babies as young as nine months who show emerging signs of autism.
How and why do autistic individuals do so well on these tasks? The answer may be surprising: more “neural noise”.
What is neural noise?
Generally, when you think of noise, you probably think of auditory noise, the ups and downs in the amplitude of sound frequencies we hear.
A similar thing happens in the brain with random fluctuations in neural activity. This is called neural noise.
This noise is always present, and comes on top of any brain activity caused by things we see, hear, smell and touch. This means that in the brain, an identical stimulus that is presented multiple times won’t cause exactly the same activity. Sometimes the brain is more active, sometimes less. In fact, even the response to a single stimulus or event will fluctuate continuously.
Neural noise in autism
There are many sources of neural noise in the brain. These include how the neurons become excited and calm again, changes in attention and arousal levels, and biochemical processes at the cellular level, among others. An allistic brain has mechanisms to manage and use this noise. For instance, cells in the hippocampus (the brain’s memory system) can make use of neural noise to enhance memory encoding and recall.
Evidence for high neural noise in autism can be seen in electroencephalography (EEG) recordings, where increased levels of neural fluctuations were observed in autistic children. This means their neural activity is less predictable, showing a wider range of activity (higher ups and downs) in response to the same stimulus.
In simple terms, if we imagine the EEG responses like a sound wave, we would expect to see small ups and downs (amplitude) in allistic brains each time they encounter a stimulus. But autistic brains seem to show bigger ups and downs, demonstrating greater amplitude of neural noise.
Many studies have linked this noisy autistic brain with cognitive, social and behavioural difficulties.
But could noise be a bonus?
The diagnosis of autism has a long clinical history. A shift from the medical to a more social model has also seen advocacy for it to be reframed as a difference, rather than a disorder or deficit. This change has also entered autism research. Neuroaffirming research can examine the uniqueness and strengths of neurodivergence.
Psychology and perception researcher David Simmons and colleagues at the University of Glasgow were the first to suggest that while high neural noise is generally a disadvantage in autism, it can sometimes provide benefits due to a phenomenon called stochastic resonance. This is where optimal amounts of noise can enhance performance. In line with this theory, high neural noise in the autistic brain might enhance performance for some cognitive tasks.
Our 2023 research explores this idea. We recruited participants from the general population and investigated their performance on letter-detection tasks. At the same time, we measured their level of autistic traits.
We performed two letter-detection experiments (one in a lab and one online) where participants had to identify a letter when displayed among background visual static of various intensities.
By using the static, we added additional visual noise to the neural noise already present in our participants’ brains. We hypothesised the visual noise would push participants with low internal brain noise (or low autistic traits) to perform better (as suggested by previous research on stochastic resonance). The more interesting prediction was that noise would not help individuals who already had a lot of brain noise (that is, those with high autistic traits), because their own neural noise already ensured optimal performance.
Indeed, one of our experiments showed people with high neural noise (high autistic traits) did not benefit from additional noise. Moreover, they showed superior performance (greater accuracy) relative to people with low neural noise when the added visual static was low. This suggests their own neural noise already caused a natural stochastic resonance effect, resulting in better performance.
It is important to note we did not include clinically diagnosed autistic participants, but overall, we showed the theory of enhanced performance due to stochastic resonance in autism has merits.
Why this is important?
Autistic people face ignorance, prejudice and discrimination that can harm wellbeing. Poor mental and physical health, reduced social connections and increased “camouflaging” of autistic traits are some of the negative impacts that autistic people face.
So, research underlining and investigating the strengths inherent in autism can help reduce stigma, allow autistic people to be themselves and acknowledge autistic people do not require “fixing”.
The autistic brain is different. It comes with limitations, but it also has its strengths.
Pratik Raul, PhD candidiate, University of Canberra; Jeroen van Boxtel, Associate professor, University of Canberra, and Jovana Acevska, Honours Graduate Student, University of Canberra
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Anise vs Diabetes & Menopause
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What A Daily Gram Of Anise Can Do
Anise, specifically the seed of the plant, also called aniseed, is enjoyed for its licorice taste—as well as its medicinal properties.
Let’s see how well the science lives up to the folk medicine…
What medicinal properties does it claim?
The main contenders are:
- Reduces menopause symptoms
- Reduces blood sugar levels
- Reduces inflammation
Does it reduce menopause symptoms?
At least some of them! Including hot flashes and bone density loss. This seems to be due to the estrogenic-like activity of anethole, the active compound in anise that gives it these effects:
Estrogenic activity of isolated compounds and essential oils of Pimpinella species
1g of anise/day yielded a huge reduction in frequency and severity of hot flashes, compared to placebo*:
*you may be wondering what the placebo is for 1g of a substance that has a very distinctive taste. The researchers used capsules, with 3x330g as the dose, either anise seed or potato starch.
❝In the experimental group, the frequency and severity of hot flashes before the treatment were 4.21% and 56.21% and, after that, were 1.06% and 14.44% at the end of the fourth week respectively. No change was found in the frequency and severity of hot flashes in the control group. The frequency and severity of hot flashes was decreased during 4 weeks of follow up period. P. anisum is effective on the frequency and severity of hot flashes in postmenopausal women. ❞
See for yourself: The Study on the Effects of Pimpinella anisum on Relief and Recurrence of Menopausal Hot Flashes
As for bone mineral density, we couldn’t find a good study for anise, but we did find this one for fennel, which is a plant of the same family and also with the primary active compound anethole:
The Prophylactic Effect of Fennel Essential Oil on Experimental Osteoporosis
That was a rat study, though, so we’d like to see studies done with humans.
Summary on this one: it clearly helps against hot flashes (per the very convincing human study we listed above); it probably helps against bone mineral density loss.
Does it reduce blood sugar levels?
This one got a flurry of attention all so recently, on account of this research review:
Review on Anti-diabetic Research on Two Important Spices: Trachyspermum ammi and Pimpinella anisum
If you read this (and we do recommend reading it! It has a lot more information than we can squeeze in here!) one of the most interesting things about the in vivo anti-diabetic activity of anise was that while it did lower the fasting blood glucose levels, that wasn’t the only effect:
❝Over a course of 60 days, study participants were administered seed powders (5 g/d), which resulted in significant antioxidant, anti-diabetic, and hypolipidemic effects.
Notably, significant reductions in fasting blood glucose levels were observed. This intervention also elicited alterations in the lipid profile, LPO, lipoprotein levels, and the high-density lipoprotein (HDL) level.
Moreover, the serum levels of essential antioxidants, such as beta carotene, vitamin C, vitamin A, and vitamin E, which are typically decreased in diabetic patients, underwent a reversal.❞
That’s just one of the studies cited in that review (the comments lightly edited here for brevity), but it stands out, and you can read that study in its entirety (it’s well worth reading).
Rajeshwari et al, bless them, added a “tl;dr” at the top of their already concise abstract; their “tl;dr” reads:
❝Both the seeds significantly influenced almost all the parameters without any detrimental effects by virtue of a number of phytochemicals, vitamins and minerals present in the seeds having therapeutic effects.❞
Shortest answer: yes, yes it does
Does it fight inflammation?
This one’s quick and simple enough: yes it does; it’s full of antioxidants which thus also have an anti-inflammatory effect:
Review of Pharmacological Properties and Chemical Constituents of Pimpinella anisum
…which can also be used an essential oil, applied topically, to fight both pain and the inflammation that causes it—at least in rats and mice:
❝Indomethacin and etodolac were treated reference drugs for the anti-inflammatory activity. Aspirin and morphine hydrochloride were treated reference drugs for the analgesic activity. The results showed that fixed oil of P. anisum has an anti-inflammatory action more than etodolac and this effect was as strong as indomethacin. P. anisum induces analgesic effect comparable to that of 100 mg/kg Aspirin and 10 mg/kg morphine at 30 th min. of the study❞
Summary of this section:
- Aniseeds are a potent source of antioxidants, which fight inflammation.
- Anise essential oil is probably also useful as a topical anti-inflammatory and analgesic agent, but we’d like to see human tests to know for sure.
Is it safe?
For most people, enjoyed in moderation (e.g., within the dosage parameters described in the above studies), anise is safe. However:
- If you’re allergic to it, it won’t be safe
- Its estrogen-mimicking effects could cause problems if you have (or have a higher risk factor for) breast cancer, ovarian cancer, or endometriosis.
- For most men, the main concern is that it may lower sperm count.
Where to get it?
As ever, we don’t sell it (or anything else), but for your convenience, you can buy the seeds in bulk on Amazon, or in case you prefer it, here’s an example of it available as an essential oil.
Enjoy!
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What’s the difference between physical and chemical sunscreens? And which one should you choose?
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Sun exposure can accelerate ageing, cause skin burns, erythema (a skin reaction), skin cancer, melasmas (or sun spots) and other forms of hyperpigmentation – all triggered by solar ultraviolet radiation.
Approximately 80% of skin cancer cases in people engaged in outdoor activities are preventable by decreasing sun exposure. This can be done in lots of ways including wearing protective clothing or sunscreens.
But not all sunscreens work in the same way. You might have heard of “physical” and “chemical” sunscreens. What’s the difference and which one is right for you?
How sunscreens are classified
Sunscreens are grouped by their use of active inorganic and organic ultraviolet (UV) filters. Chemical sunscreens use organic filters such as cinnamates (chemically related to cinnamon oil) and benzophenones. Physical sunscreens (sometimes called mineral sunscreens) use inorganic filters such as titanium and zinc oxide.
These filters prevent the effects of UV radiation on the skin.
Organic UV filters are known as chemical filters because the molecules in them change to stop UV radiation reaching the skin. Inorganic UV filters are known as physical filters, because they work through physical means, such as blocking, scattering and reflection of UV radiation to prevent skin damage.
Nano versus micro
The effectiveness of the filters in physical sunscreen depends on factors including the size of the particle, how it’s mixed into the cream or lotion, the amount used and the refraction index (the speed light travels through a substance) of each filter.
When the particle size in physical sunscreens is large, it causes the light to be scattered and reflected more. That means physical sunscreens can be more obvious on the skin, which can reduce their cosmetic appeal.
Nanoparticulate forms of physical sunscreens (with tiny particles smaller than 100 nanometers) can improve the cosmetic appearance of creams on the skin and UV protection, because the particles in this size range absorb more radiation than they reflect. These are sometimes labelled as “invisible” zinc or mineral formulations and are considered safe.
So how do chemical sunscreens work?
Chemical UV filters work by absorbing high-energy UV rays. This leads to the filter molecules interacting with sunlight and changing chemically.
When molecules return to their ground (or lower energy) state, they release energy as heat, distributed all over the skin. This may lead to uncomfortable reactions for people with skin sensitivity.
Generally, UV filters are meant to stay on the epidermis (the first skin layer) surface to protect it from UV radiation. When they enter into the dermis (the connective tissue layer) and bloodstream, this can lead to skin sensitivity and increase the risk of toxicity. The safety profile of chemical UV filters may depend on whether their small molecular size allows them to penetrate the skin.
Chemical sunscreens, compared to physical ones, cause more adverse reactions in the skin because of chemical changes in their molecules. In addition, some chemical filters, such as dibenzoylmethane tend to break down after UV exposure. These degraded products can no longer protect the skin against UV and, if they penetrate the skin, can cause cell damage.
Due to their stability – that is, how well they retain product integrity and effectiveness when exposed to sunlight – physical sunscreens may be more suitable for children and people with skin allergies.
Although sunscreen filter ingredients can rarely cause true allergic dermatitis, patients with photodermatoses (where the skin reacts to light) and eczema have higher risk and should take care and seek advice.
What to look for
The best way to check if you’ll have a reaction to a physical or chemical sunscreen is to patch test it on a small area of skin.
And the best sunscreen to choose is one that provides broad-spectrum protection, is water and sweat-resistant, has a high sun protection factor (SPF), is easy to apply and has a low allergy risk.
Health authorities recommend sunscreen to prevent sun damage and cancer. Chemical sunscreens have the potential to penetrate the skin and may cause irritation for some people. Physical sunscreens are considered safe and effective and nanoparticulate formulations can increase their appeal and ease of use.
Yousuf Mohammed, Dermatology researcher, The University of Queensland and Khanh Phan, Postdoctoral research associate, Frazer Institute, The University of Queensland
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Cooking for Longevity – by Nisha Melvani
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Before it gets to the recipes, this book kicks off with a lot of science (much more than is usual for even healthy-eating recipe books), demystifying more nutrients than most people think of on a daily basis, what they do and where to get them, and even how to enhance nutrient absorption.
As well as an up-front ingredients list, we additionally get not just meal planning advice in the usual sense of the word, but also advice on timing various aspects of nutrition in order to enjoy the best metabolic benefits.
The recipes themselves are varied and good. It’s rare to find a recipe book that doesn’t include some redundant recipes, and this one’s no exception, but it’s better to have too much information than too little, so it’s perhaps no bad thing that all potentially necessary bases are covered.
In terms of how well it delivers on the title’s promised “cooking for longevity” and the subtitle’s promised “boosting healthspan”, the science is good; very consistent with what we write here at 10almonds, and well-referenced too.
Bottom line: if you’d like recipes to help you live longer and more healthily, then this book has exactly that.
Click here to check out Cooking For Longevity, and cook for longevity!
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Undo The Sun’s Damage To Your Skin
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It’s often said that our skin is our largest organ. Our brain or liver are the largest solid organs by mass (which one comes out on top will vary from person to person), our gut is the longest, and our lungs are the largest by surface area. But our skin is large, noticeable, and has a big impact on the rest of our health.
The sun is one of the main damaging factors for our skin; assorted toxins are also a major threat for many people, and once the skin barrier gets broken, it’s a field-day for bacteria.
So, what can we do about it?
Tretinoin: the skin’s rejuvenator
Tretinoin is also called retinoic acid, not to be mistaken for retinol, although they are both retinoids. Tretinoin is much stronger.
As for what it’s stronger at:
It’s usually prescribed for the treatment of sun-damage, acne, and wrinkles. Paradoxically, it works by inflaming the skin (and then making it better, and having done so, keeping it better).
In few words: it encourages your skin to speed up its life cycle, which means that cells die and are replaced sooner, which means the average age of skin cells will be considerably younger at any given time.
This is the same principle as we see at work when it comes to cellular apoptosis and autophagy in general, and specifically the same idea as we discussed when talking about senolytics, compounds that kill aging cells:
Fisetin: The Anti-Aging Assassin
About that paradoxical inflammation…
❝The topical use of tretinoin as an antiacne agent began almost a half century ago. Since that time it has been successfully used to treat comedonal and inflammatory acne.
Over the intervening years, the beneficial effects of tretinoin have grown from an understanding of its potent cornedolytie-related properties to an evolving appreciation of its antiinflammatory actions.
…
The topical use of clindamycin and tretinoin as a combination treatment modality that includes antibacterial, comedolytic, and antiinflammatoiy properties has proven to be a very effective therapy for treating the various stages of acne
…
It is now becoming increasingly clear that there may be good reasons for these observations.❞
~ Drs. Schmidt & Gans, lightly edited here for brevity
Read in full: Tretinoin: A Review of Its Anti-inflammatory Properties in the Treatment of Acne
Against damage by the sun
The older we get, the more likely sun damage is a problem than acne. And in the case of tretinoin,
❝In several well-controlled clinical trials, the proportion of patients showing improvement was significantly higher with 0.01 or 0.05% tretinoin cream than with placebo for criteria such as global assessment, fine and coarse wrinkling, pigmentation and roughness.
Improvements in the overall severity of photodamage were also significantly greater with tretinoin than with placebo.
…
Several placebo-controlled clinical studies have demonstrated that topical tretinoin has significant efficacy in the treatment of photodamaged skin. Improvements in subjective global assessment scores were recorded in:
49–100% of patients using once-daily 0.01% tretinoin,
68–100% of patients using 0.05% tretinoin, and
0–44% of patients using placebo.❞
~ Drs. Wagstaff & Noble
…which is quite compelling.
Read in full: Tretinoin: A Review of its Pharmacological Properties and Clinical Efficacy in the Topical Treatment of Photodamaged Skin
This is very well-established by now; here’s an old paper from when the mechanism of action was unknown (here in the current day, 17 mechanisms of action have been identified; beyond the scope of this article as we only have so much room, but it’s nice to see science building on science):
❝Tretinoin cream has been used extensively to reverse the changes of photoaging. It is the first topical therapy to undergo controlled clinical testing and proved to be efficacious. These results have been substantiated with photography, histopathologie examination, and skin surface replicas.
…
Tretinoin cream has an excellent safety record; a local cutaneous hypervitaminosis A reaction is the only common problem.❞
~ Dr. Goldfarb et al.
Read in full: Topical tretinoin therapy: Its use in photoaged skin
Is it safe?
For most people, when used as directed*, yes. However, it’s likely to irritate your skin at first, and that’s normal. If this persists more than a few weeks, or seems unduly severe, then you might want to stop and talk to your doctor again.
*See also: Scarring following inappropriate use of 0.05% tretinoin gel
(in the case of a young woman who used it 4x daily instead of 1x daily)
Want to try some?
Tretinoin is prescription-only, so speak with your doctor/pharmacist about that. Alternatively, retinal (not retinol) is the strongest natural alternative that works on the same principles; here’s an example product on Amazon 😎
Take care!
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Sun, Sea, And Sudden Killers To Avoid
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Stay Safe From Heat Exhaustion & Heatstroke!
For most of us, summer is upon us now. Which can be lovely… and also bring new, different health risks. Today we’re going to talk about heat exhaustion and heatstroke.
What’s the difference?
Heat exhaustion is a milder form of heatstroke, but the former can turn into the latter very quickly if left untreated.
Symptoms of heat exhaustion include:
- Headache
- Nausea
- Cold sweats
- Light-headedness
Symptoms of heatstroke include the above and also:
- Red/flushed-looking skin
- High body temperature (104ºF / 40ºC)
- Disorientation/confusion
- Accelerated heart rate
Click here for a handy downloadable infographic you can keep on your phone
What should we do about it?
In the case of heatstroke, call 911 or the equivalent emergency number for the country where you are.
Hopefully we can avoid it getting that far, though:
Prevention first
Here are some top tips to avoid heat exhaustion and thus also avoid heatstroke. Many are common sense, but it’s easy to forget things—especially in the moment, on a hot sunny day!
- Hydrate, hydrate, hydrate
- (Non-sugary) iced teas, fruit infusions, that sort of thing are more hydrating than water alone
- Avoid alcohol
- If you really want to imbibe, rehydrate between each alcoholic drink
- Time your exercise with the heat in mind
- In other words, make any exercise session early or late in the day, not during the hottest period
- Use sunscreen
- This isn’t just for skin health (though it is important for that); it will also help keep you cooler, as it blocks the UV rays that literally cook your cells
- Keep your environment cool
- Shade is good, air conditioning / cooling fans can help.
- A wide-brimmed hat is portable shade just for you
- Wear loose, breathable clothing
- We write about health, not fashion, but: light breathable clothes that cover more of your body are generally better healthwise in this context, than minimal clothes that don’t, if you’re in the sun.
- Be aware of any medications you’re taking that will increase your sensitivity to heat.
- This includes medications that are dehydrating, and includes most anti-depressants, many anti-nausea medications, some anti-allergy medications, and more.
- Check your labels/leaflets, look up your meds online, or ask your pharmacist.
Treatment
If prevention fails, treatment is next. Again, in the case of heatstroke, it’s time for an ambulance.
If symptoms are “only” of heat exhaustion and are more mild, then:
- Move to a cooler location
- Rehydrate again
- Remove clothing that’s confining or too thick
- What does confining mean? Clothing that’s tight and may interfere with the body’s ability to lose heat.
- For example, you might want to lose your sports bra, but there is no need to lose a bikini, for instance.
- What does confining mean? Clothing that’s tight and may interfere with the body’s ability to lose heat.
- Use ice packs or towels soaked in cold water, applied to your body, especially wear circulation is easiest to affect, e.g. forehead, wrists, back of neck, under the arms, or groin.
- A cool bath or shower, or a dip in the pool may help cool you down, but only do this if there’s someone else around and you’re not too dizzy.
- This isn’t a good moment to go in the sea, no matter how refreshing it would be. You do not want to avoid heatstroke by drowning instead.
If full recovery doesn’t occur within a couple of hours, seek medical help.
Stay safe and have fun!
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Coconut & Lemongrass Protein Soup
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The main protein here is pea protein, but the soup’s health benefits don’t stop there. With healthy MCTs from the coconut, as well as phytochemical benefits from the ginger and chili, this wonderfully refreshing soup has a lot to offer.
You will need
- 1 can coconut milk
- 1 cup vegetable stock (making your own, or buying a low-sodium option)
- 1 cup frozen petits pois
- 1 oz fresh ginger, roughly chopped
- ½ oz lemongrass stalk, crumpled without being broken into multiple pieces
- 1 red chili, roughly chopped
- 1 tbsp white miso paste
- zest and juice of 1 lime
- Optional: garnish of your choice
Method
(we suggest you read everything at least once before doing anything)
1) Mix the coconut milk, vegetable stock, ginger, and chili in a saucepan, and simmer for 15 minutes
2) Remove the lemongrass and ginger (and the chili if you don’t want more heat), and add the petit pois. Bring back to a simmer for about 2 minutes more, stir in the miso paste and lime, then take off the heat.
3) Blend the soup to a smooth purée. Since it is hot, you will need to either use a stick blender, or else a food processor that is ok with blending hot liquids (many are not, so don’t use yours unless you’re sure, as it might explode if it’s not made for that). Alternatively, you can let it cool, blend it, and then reheat it.
4) Serve, adding a garnish if you so wish:
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Can Saturated Fats Be Healthy?
- Ginger Does A Lot More Than You Think
- Capsaicin For Weight Loss And Against Inflammation
Take care!
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