Neurologists Debunk 11 Brain Myths
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Neuroscientists Dr. Santoshi Billakota and Dr. Brad Kamitaki debunk 11 myths about the brain. How many did you know?
From the top
Without further ado, the myths are…
- “We only use 10% of our brains”: False! We use most parts of our brain at different times, depending on the activity. PET/MRI scans show widespread usage.
- “The bigger the brain, the smarter the creature”: False! While there’s often a correlation, intelligence depends on brain complexity and development of specific regions, not overall size. For this reason get, for example, some corvids that are more intelligent than some dogs.
- “IQ tests are an accurate measure of intelligence”: False! IQ tests measure limited aspects of intelligence and are influenced by external factors like test conditions and education.
- “Video games rot your brain”: False! Video games can improve problem-solving, strategy, and team-building skills when played in moderation.
- “Memory gets worse as you age”: Partly false. While episodic memory may decline, semantic and procedural memory often improve with age.
- “Left-brained people are logical, and right-brained people are creative”: False! Both hemispheres work together, and personality or skills are influenced by environment and experiences, not brain hemispheres.
- “You can’t prevent a stroke”: False! Strokes can often be prevented by managing risk factors like blood pressure, cholesterol, and lifestyle choices.
- “Eating fish makes you smarter”: False! Eating fish, especially those rich in omega-3s, can support brain health but won’t increase intelligence.
- “You can always trust your senses”: False! Senses can be deceptive and influenced by emotions, memories, or neurological conditions.
- “Different sexes have different brains”: False! Structurally, brains are the same regardless of chromosomal sex; differences arise from environmental (including hormonal) and experiential factors—and even there, there’s more than enough overlap that we are far from categorizable as sexually dimorphic.
- “If you have a seizure, you have epilepsy”: False! A seizure can occur from various causes, but epilepsy is defined by recurrent unprovoked seizures and requires specific diagnosis and treatment.
For more on all of these, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
The Dopamine Myth ← a bonus 12th myth!
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How Emotions Are Made – by Dr. Lisa Feldman Barrett
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We’ve previously reviewed Dr. Barrett’s (also good) book Seven And A Half Lessons About The Brain, and this one is very different, and of more practical use:
The main thrust of the book is: the bioessentialist model of emotions is flawed; there is also no Platonic perfect form of any given emotion, and in fact emotions are constructed by the brain as a learned adaptive response.
She argues this from the dual vectors of on the one hand hard sciences of affective neuroscience and clinical psychology, and on the other hand sociology and anthropology.
In the category of criticism: Dr. Barrett, a very well-known and well-respected cognitive neuroscientist, is not an expert on sociology and anthropology, and some of her claims there are verifiably false.
However, most of the book is given over the psychophysiology, which is entirely her thing, and she explains it clearly and simply while backing everything up with mountains of data.
The usefulness of this book is chiefly: if we understand that emotions are not innate and are instead constructed adaptive (and sometimes maladaptive) neurological responses to stimuli and associations, we can set about rewiring things a little in accord with what’s actually more beneficial to us. The book also outlines how.
Bottom line: if you’d like to be able to not merely manage emotions as they are, but also prune and/or grow them from the stem up, then this book provides a robustly scientific approach for doing that.
Click here to check out How Emotions Are Made, and get more discerning about yours!
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7 Minutes, 30 Days, Honest Review: How Does The 7-Minute Workout Stack Up?
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For those who don’t like exercising, “the 7-minute workout” (developed by exercise scientists Chris Jordan and Bret Klika) has a lot of allure. After all, it’s just 7 minutes and then you’re done! But how well does it stand up, outside of the lab?
Down-to-Earth
Business Insider’s Kelly Reilly is not a health guru, and here he reviews the workout for us, so that we can get a real view of what it’s really like in the real world. What does he want us to know?
- It’s basically an optimized kind of circuit training, and can be done with no equipment aside from a floor, a wall, and a chair
- It’s one exercise for 30 seconds, then 10 seconds rest, then onto the next exercise
- He found it a lot easier to find the motivation to do this, than go to the gym. After all “it’s just 7 minutes” is less offputting than getting in the car, driving someplace, using public facilities, driving back, etc. Instead, it’s just him in the comfort of his home
- The exercise did make him sweat and felt like a “real” workout in that regard
- He didn’t like missing out on training his biceps, though, since there are no pulling movements
- He lost a little weight over the course of the month, though that wasn’t his main goal (and indeed, he was not eating healthily)
- He did feel better each day after working out, and at the end of the month, he enjoyed feeling self-confident in a tux that now fitted him better than it did before
For more details, his own words, and down-to-earth visuals of what this looked like for him, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Further reading
Want to know more? Check out…
- How To Do HIIT (Without Wrecking Your Body)
- HIIT, But Make It HIRT ← this is about high-intensity resistance training!
Take care!
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Yes, you do need to clean your tongue. Here’s how and why
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Has your doctor asked you to stick out your tongue and say “aaah”? While the GP assesses your throat, they’re also checking out your tongue, which can reveal a lot about your health.
The doctor will look for any changes in the tongue’s surface or how it moves. This can indicate issues in the mouth itself, as well as the state of your overall health and immunity.
But there’s no need to wait for a trip to the doctor. Cleaning your tongue twice a day can help you check how your tongue looks and feels – and improve your breath.
luisrsphoto/Shutterstock What does a healthy tongue look like?
Our tongue plays a crucial role in eating, talking and other vital functions. It is not a single muscle but rather a muscular organ, made up of eight muscle pairs that help it move.
The surface of the tongue is covered by tiny bumps that can be seen and felt, called papillae, giving it a rough surface.
These are sometimes mistaken for taste buds – they’re not. Of your 200,000-300,000 papillae, only a small fraction contain taste buds. Adults have up to 10,000 taste buds and they are invisible to the naked eye, concentrated mainly on the tip, sides and back of the tongue. https://www.youtube.com/embed/uYvpUl7li9Y?wmode=transparent&start=0
A healthy tongue is pink although the shade may vary from person to person, ranging from dark to light pink.
A small amount of white coating can be normal. But significant changes or discolouration may indicate a disease or other issues.
How should I clean my tongue?
Cleaning your tongue only takes around 10-15 seconds, but it’s is a good way to check in with your health and can easily be incorporated into your teeth brushing routine.
Build-up can occur if you stop brushing or scraping your tongue even for a few days. Anthony Shkraba/Pexels You can clean your tongue by gently scrubbing it with a regular toothbrush. This dislodges any food debris and helps prevent microbes building up on its rough textured surface.
Or you can use a special tongue scraper. These curved instruments are made of metal or plastic, and can be used alone or accompanied by scrubbing with your toothbrush.
Your co-workers will thank you as well – cleaning your tongue can help combat stinky breath. Tongue scrapers are particularly effective at removing the bacteria that commonly causes bad breath, hidden in the tongue’s surface.
What’s that stuff on my tongue?
So, you’re checking your tongue during your twice-daily clean, and you notice something different. Noting these signs is the first step. If you observe any changes and they worry you, you should talk to your GP.
Here’s what your tongue might be telling you.
White coating
Developing a white coating on the tongue’s surface is one of the most common changes in healthy people. This can happen if you stop brushing or scraping the tongue, even for a few days.
In this case, food debris and microbes have accumulated and caused plaque. Gentle scrubbing or scraping will remove this coating. Removing microbes reduces the risk of chronic infections, which can be transferred to other organs and cause serious illnesses.
Scrubbing or scraping your tongue only takes around ten seconds and can be done while brushing your teeth. Ketut Subiyanto/Pexels Yellow coating
This may indicate oral thrush, a fungal infection that leaves a raw surface when scrubbed.
Oral thrush is common in elderly people who take multiple medications or have diabetes. It can also affect children and young adults after an illness, due to the temporary suppression of the immune system or antibiotic use.
If you have oral thrush, a doctor will usually prescribe a course of anti-fungal medication for at least a month.
Black coating
Smoking or consuming a lot of strong-coloured food and drink – such as tea and coffee, or dishes with tumeric – can cause a furry appearance. This is known as a black hairy tongue. It’s not hair, but an overgrowth of bacteria which may indicate poor oral hygiene.
Smoking can add to poor oral hygiene and make the tongue look black. Sophon Nawit/Shutterstock Pink patches
Pink patches surrounded by a white border can make your tongue look like a map – this is called “geographic tongue”. It’s not known what causes this condition, which usually doesn’t require treatment.
Pain and inflammation
A red, sore tongue can indicate a range of issues, including:
- nutritional deficiencies such as folic acid or vitamin B12
- diseases including pernicious anaemia, Kawasaki disease and scarlet fever
- inflammation known as glossitis
- injury from hot beverages or food
- ulcers, including cold sores and canker sores
- burning mouth syndrome.
Dryness
Many medications can cause dry mouth, also called xerostomia. These include antidepressants, anti-psychotics, muscle relaxants, pain killers, antihistamines and diuretics. If your mouth is very dry, it may hurt.
What about cancer?
White or red patches on the tongue that can’t be scraped off, are long-standing or growing need to checked out by a dental professional as soon as possible, as do painless ulcers. These are at a higher risk of turning into cancer, compared to other parts of the mouth.
Oral cancers have low survival rates due to delayed detection – and they are on the rise. So checking your tongue for changes in colour, texture, sore spots or ulcers is critical.
Dileep Sharma, Professor and Head of Discipline – Oral Health, University of Newcastle
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Sleeping on Your Back after 50; Yay or Nay?
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Sleeping Differently After 50
Sleeping is one of those things that, at any age, can be hard to master. Some of our most popular articles have been on getting better sleep, and effective sleep aids, and we’ve had a range of specific sleep-related questions, like whether air purifiers actually improve your sleep.
But perhaps there’s an underlying truth hidden in our opening sentence…is sleeping consistently difficult because the way we sleep should change according to our age?
Inspired by Brad and Mike’s video below (which was published to their 5 million+ subscribers!), there are 4 main elements to consider when sleeping on your back after you’ve hit the 50-year mark:
- Degenerative Disk Disease: As you age, your spine may start to show signs of wear and tear, which directly affects comfort while lying on your back.
- Sleep Apnea and Snoring: Sleep Apnea and snoring become more of an issue with age, and sleeping on your back can exacerbate these problems; when you sleep on your back, the soft tissues in your throat, as well as your tongue, “fall back” and partly obstruct your the airway.
- Spinal Stenosis: Spinal Stenosis–the often-age-related narrowing of your spinal canal–can put pressure on the nerves that travel through the spine, which equally makes back-sleeping harder.
- GERD: The all-too-familiar gastroesophageal reflux disease can be more problematic when lying flat on your back, as doing so can allow easy access for stomach acid to move upwards.
Alternatives to Back Sleeping
Referencing the Mayo Clinic’s Sleep Facility’s director, Dr. Virend Somers, today’s video suggests a simple solution: sleeping on your side. The video goes into a bit more detail but, as you know, here at 10almonds we like to cut to the chase.
Modifications for Back Sleeping
If you’re a lifelong back-sleeping and cannot bear the idea of changing to your side, or your stomach, then there are a few modifications that you can make to ease any pain and discomfort.
Most solutions revolve around either leg wedges or pillow adjustments. For instance, if you’re suffering from back pain, try propping your knees up. Or if GERD is your worst enemy, a wedge pillow could help keep that acid down.
As can be expected, the video dives into more detail:
How was the video? If you’ve discovered any great videos yourself that you’d like to share with fellow 10almonds readers, then please do email them to us!
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The Dopa-Bean
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Mucuna pruriens, also called the “magic velvet bean”, is an established herbal drug used for the management of male infertility, nervous disorders, and also as an aphrodisiac:
The Magic Velvet Bean of Mucuna pruriens
How it works is more interesting than that, though.
It’s about the dopamine
M. pruriens contains levodopa (L-dopa). That’s right, the same as the dopaminergic medication most often prescribed for Parkinson’s disease. Furthermore, it might even be better than synthetic L-dopa, because:
❝M. pruriens seed extract demonstrated acetylcholinesterase inhibitory activity, while synthetic L-dopa enhanced the activity of the enzyme. It can be concluded that the administration of M. pruriens seed might be effective in protecting the brain against neurodegenerative disorders such as Parkinson’s and Alzheimer’s diseases.
M. pruriens seed extract containing L-dopa has shown less acetylcholinesterase activity stimulation compared with L-dopa, suggesting that the extract might have a superior benefit for use in the treatment of Parkinson’s disease.❞
~ Dr. Narisa Kamkaen et al.
Indeed, it has been tested specifically in (human!) Parkinson’s disease patients, which RCT found:
❝The rapid onset of action and longer on time without concomitant increase in dyskinesias on mucuna seed powder formulation suggest that this natural source of l-dopa might possess advantages over conventional l-dopa preparations in the long term management of Parkinson’s disease❞
~ Dr. Regina Katzenschlager et al.
Read more: Mucuna pruriens in Parkinson’s disease: a double-blind clinical and pharmacological study
Beyond Parkinson’s disease
M. pruriens has also been tested and found beneficial in cases of disease other than Parkinson’s, thus:
Mucuna pruriens in Parkinson’s and in some other diseases: recent advancement and future prospective
…but the science is less well-established for things not generally considered related to dopamine, such as cancer, diabetes, and cardiometabolic disorders.
Note, however, that the science for it being neuroprotective is rather stronger.
Against depression
Depression can have many causes, and (especially on a neurological level) diverse presentations. As such, sometimes what works for one person’s depression won’t touch another person’s, because the disease and treatment are about completely different neurotransmitter dysregulations. So, if a person’s depression is due to a shortage of serotonin, for example, then perking up the dopamine won’t help much, and vice versa. See also:
Antidepressants: Personalization Is Key!
When it comes to M. pruriens and antidepressant activity, then predictably it will be more likely to help if your depression is due to too little dopamine. Note that this means that even if your depression is dopamine-based, but the problem is with your dopamine receptors and not the actual levels of dopamine, then this may not help so much, depending on what else you have going on in there.
The science for M. pruriens and depression is young, and we only found non-human animal studies so far, for example:
In summary
It’s good against Parkinson’s in particular and is good against neurodegeneration in general.
It may be good against depression, depending on the kind of depression you have.
Is it safe?
That’s a great question! And the answer is: it depends. For most people, in moderation, it should be fine (but, see our usual legal/medical disclaimer). Definitely don’t take it if you have bipolar disorder or any kind of schizoid/psychotic disorder; it is likely to trigger a manic/psychotic episode if you do.
For more on this, we discussed it (pertaining to L-dopa in general, not M. pruriens specifically) at greater length here:
An Accessible New Development Against Alzheimer’s ← scroll down to the heading that reads “Is there a catch?”
Want to try some?
We don’t sell it, but here for your convenience is an example product on Amazon 😎
Enjoy!
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In the Realm of Hungry Ghosts – by Dr. Gabor Maté
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We’ve reviewed books by Dr. Maté before, and this one’s about addiction. We’ve reviewed books about addiction before too, so what makes this one different?
Wow, is this one so different. Most books about addiction are about “beating” it. Stop drinking, quit sugar, etc. And, that’s all well and good. It is definitely good to do those things. But this one’s about understanding it, deeply. Because, as Dr. Maté makes very clear, “there, but for the grace of epigenetics and environmental factors, go we”.
Indeed, most of us will have addictions; they’re (happily) just not too problematic for most of us, being either substances that are not too harmful (e.g. coffee), or behavioral addictions that aren’t terribly impacting our lives (e.g. Dr. Maté’s compulsion to keep buying more classical music, which he then tries to hide from his wife).
The book does also cover a lot of much more serious addictions, the kind that have ruined lives, and the kind that definitely didn’t need to, if people had been given the right kind of help—instead of, all too often, they got the opposite.
Perhaps the greatest value of this book is that; understanding what creates addiction in the first place, what maintains it, and what help people actually need.
Bottom line: if you’d like more insight into the human aspect of addiction without getting remotely wishy-washy, this book is probably the best one out there.
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