How Does Alcohol Cause Blackouts?
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Sometimes people who have never experienced an alcoholic blackout wonder “is it real, or is it just a convenient excuse to avoid responsibility/embarrassment with regard to things done while drunk?”
In 1969 (so, still in the era of incredibly unethical psychological experiments that ranged from the 50s into the 70s), Dr. Donald Goodwin conducted a study in which intoxicated participants were asked to recall an object they had just seen. Most succeeded initially, but half were unable to remember the object just 30 minutes later, demonstrating alcohol-induced memory blackouts.
But, is it any different from regular forgetting? And the answer is: yes, it is indeed different.
The memories that never got stored
Ethanol, the active compound in alcohol, is lipophilic, enabling it to cross the blood-brain barrier and disrupt brain function. It impairs all kinds of things, including decision-making, impulse control, motor skills, and, notably, memory networks—which is what we’re looking at today.
Memory formation (beyond “working memory”, which is the kind that enables you to have an idea of what you were just doing, and carry out simple plans like “pick up this cup, raise it to my mouth, and take a sip”, without forgetting partway through) relies on a process called long-term potentiation (LTP), which strengthens neural connections to store information. Ethanol disrupts this process, preventing memory storage and causing blackouts.
In effect, this means you didn’t just forget a memory; you never stored it in the first place. For this reason, experiences from during an alcoholic blackout cannot be retrieved in the same ways we might retrieve other memories (e.g. in regular forgetting, it’s possible that a context clue jogs our memory and then we remember the experience—because in regular forgetting, the memory was in there; we just didn’t recall it until we were reminded).
Blackouts (in which the memory is never stored in the first place) typically occur when blood alcohol concentration (BAC) exceeds 0.16, while lower levels can result in partial memory loss (brownouts) in which some things may be recalled, but not others. Factors such as dehydration, genetics, medications, food consumption, and age influence the likelihood of complete blackouts.
While alcohol’s residual effects typically subside within a day, repeated over-drinking can cause permanent neuron damage, as well as of course plenty of damage to other organs in the body (especially the liver and gut).
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What Happens To Your Body When You Stop Drinking Alcohol
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Death by Food Pyramid – by Denise Minger
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This one is less about “here’s the perfect way of eating” or even “these specific foods are ontologically evil”, but more about teaching science literacy.
The author explores various health trends from the 70s until time of writing (the book was published in 2014), what rationales originally prompted them, and what social phenomena either helped them to persist, or caused them to get dropped quite quickly.
Of course, even in the case of fads that are societally dropped quite quickly, on an individual level there will always be someone just learning about it for the first time, reading some older material, and thinking “that sounds like just the miracle life-changer I need!”
What she teaches the reader to do is largely what we do a lot of here at 10almonds—examine the claims, go to the actual source material (studies! Not just books about studies!), and see whether the study conclusions actually support the claim, to start with, and then further examine to see if there’s some way (or sometimes, a plurality of ways) in which the study itself is methodologically flawed.
Which does happen sometimes, do actually watch out for that!
The style is quite personal and entertaining for the most part, and yet even moving sometimes (the title is not hyperbole; deaths will be discussed). As one might expect of a book teaching science literacy, it’s very easy to read, with copious footnotes (well, actually they are at the back of the book doubling up as a bibliography, but they are linked-to throughout) for those who wish to delve deeper—something the author, of course, encourages.
Bottom line: if you’d like to be able to sort the real science from the hype yourself, then this book can set you on the right track!
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People with dementia aren’t currently eligible for voluntary assisted dying. Should they be?
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Dementia is the second leading cause of death for Australians aged over 65. More than 421,000 Australians currently live with dementia and this figure is expected to almost double in the next 30 years.
There is ongoing public discussion about whether dementia should be a qualifying illness under Australian voluntary assisted dying laws. Voluntary assisted dying is now lawful in all six states, but is not available for a person living with dementia.
The Australian Capital Territory has begun debating its voluntary assisted dying bill in parliament but the government has ruled out access for dementia. Its view is that a person should retain decision-making capacity throughout the process. But the bill includes a requirement to revisit the issue in three years.
The Northern Territory is also considering reform and has invited views on access to voluntary assisted dying for dementia.
Several public figures have also entered the debate. Most recently, former Australian Chief Scientist, Ian Chubb, called for the law to be widened to allow access.
Others argue permitting voluntary assisted dying for dementia would present unacceptable risks to this vulnerable group.
Inside Creative House/Shutterstock Australian laws exclude access for dementia
Current Australian voluntary assisted dying laws exclude access for people who seek to qualify because they have dementia.
In New South Wales, the law specifically states this.
In the other states, this occurs through a combination of the eligibility criteria: a person whose dementia is so advanced that they are likely to die within the 12 month timeframe would be highly unlikely to retain the necessary decision-making capacity to request voluntary assisted dying.
This does not mean people who have dementia cannot access voluntary assisted dying if they also have a terminal illness. For example, a person who retains decision-making capacity in the early stages of Alzheimer’s disease with terminal cancer may access voluntary assisted dying.
What happens internationally?
Voluntary assisted dying laws in some other countries allow access for people living with dementia.
One mechanism, used in the Netherlands, is through advance directives or advance requests. This means a person can specify in advance the conditions under which they would want to have voluntary assisted dying when they no longer have decision-making capacity. This approach depends on the person’s family identifying when those conditions have been satisfied, generally in consultation with the person’s doctor.
Another approach to accessing voluntary assisted dying is to allow a person with dementia to choose to access it while they still have capacity. This involves regularly assessing capacity so that just before the person is predicted to lose the ability to make a decision about voluntary assisted dying, they can seek assistance to die. In Canada, this has been referred to as the “ten minutes to midnight” approach.
But these approaches have challenges
International experience reveals these approaches have limitations. For advance directives, it can be difficult to specify the conditions for activating the advance directive accurately. It also requires a family member to initiate this with the doctor. Evidence also shows doctors are reluctant to act on advance directives.
Particularly challenging are scenarios where a person with dementia who requested voluntary assisted dying in an advance directive later appears happy and content, or no longer expresses a desire to access voluntary assisted dying.
What if the person changes their mind? Jokiewalker/Shutterstock Allowing access for people with dementia who retain decision-making capacity also has practical problems. Despite regular assessments, a person may lose capacity in between them, meaning they miss the window before midnight to choose voluntary assisted dying. These capacity assessments can also be very complex.
Also, under this approach, a person is required to make such a decision at an early stage in their illness and may lose years of otherwise enjoyable life.
Some also argue that regardless of the approach taken, allowing access to voluntary assisted dying would involve unacceptable risks to a vulnerable group.
More thought is needed before changing our laws
There is public demand to allow access to voluntary assisted dying for dementia in Australia. The mandatory reviews of voluntary assisted dying legislation present an opportunity to consider such reform. These reviews generally happen after three to five years, and in some states they will occur regularly.
The scope of these reviews can vary and sometimes governments may not wish to consider changes to the legislation. But the Queensland review “must include a review of the eligibility criteria”. And the ACT bill requires the review to consider “advanced care planning”.
Both reviews would require consideration of who is able to access voluntary assisted dying, which opens the door for people living with dementia. This is particularly so for the ACT review, as advance care planning means allowing people to request voluntary assisted dying in the future when they have lost capacity.
The legislation undergoes a mandatory review. Jenny Sturm/Shutterstock This is a complex issue, and more thinking is needed about whether this public desire for voluntary assisted dying for dementia should be implemented. And, if so, how the practice could occur safely, and in a way that is acceptable to the health professionals who will be asked to provide it.
This will require a careful review of existing international models and their practical implementation as well as what would be feasible and appropriate in Australia.
Any future law reform should be evidence-based and draw on the views of people living with dementia, their family caregivers, and the health professionals who would be relied on to support these decisions.
Ben White, Professor of End-of-Life Law and Regulation, Australian Centre for Health Law Research, Queensland University of Technology; Casey Haining, Research Fellow, Australian Centre for Health Law Research, Queensland University of Technology; Lindy Willmott, Professor of Law, Australian Centre for Health Law Research, Queensland University of Technology, Queensland University of Technology, and Rachel Feeney, Postdoctoral research fellow, Queensland University of Technology
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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We don’t all need regular skin cancer screening – but you can know your risk and check yourself
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Australia has one of the highest skin cancer rates globally, with nearly 19,000 Australians diagnosed with invasive melanoma – the most lethal type of skin cancer – each year.
While advanced melanoma can be fatal, it is highly treatable when detected early.
But Australian clinical practice guidelines and health authorities do not recommend screening for melanoma in the general population.
Given our reputation as the skin cancer capital of the world, why isn’t there a national screening program? Australia currently screens for breast, cervical and bowel cancer and will begin lung cancer screening in 2025.
It turns out the question of whether to screen everyone for melanoma and other skin cancers is complex. Here’s why.
Pixel-Shot/Shutterstock The current approach
On top of the 19,000 invasive melanoma diagnoses each year, around 28,000 people are diagnosed with in-situ melanoma.
In-situ melanoma refers to a very early stage melanoma where the cancerous cells are confined to the outer layer of the skin (the epidermis).
Instead of a blanket screening program, Australia promotes skin protection, skin awareness and regular skin checks (at least annually) for those at high risk.
About one in three Australian adults have had a clinical skin check within the past year.
Those with fairer skin or a family history may be at greater risk of skin cancer. Halfpoint/Shutterstock Why not just do skin checks for everyone?
The goal of screening is to find disease early, before symptoms appear, which helps save lives and reduce morbidity.
But there are a couple of reasons a national screening program is not yet in place.
We need to ask:
1. Does it save lives?
Many researchers would argue this is the goal of universal screening. But while universal skin cancer screening would likely lead to more melanoma diagnoses, this might not necessarily save lives. It could result in indolent (slow-growing) cancers being diagnosed that might have never caused harm. This is known as “overdiagnosis”.
Screening will pick up some cancers people could have safely lived with, if they didn’t know about them. The difficulty is in recognising which cancers are slow-growing and can be safely left alone.
Receiving a diagnosis causes stress and is more likely to lead to additional medical procedures (such as surgeries), which carry their own risks.
2. Is it value for money?
Implementing a nationwide screening program involves significant investment and resources. Its value to the health system would need to be calculated, to ensure this is the best use of resources.
Narrower targets for better results
Instead of screening everyone, targeting high-risk groups has shown better results. This focuses efforts where they’re needed most. Risk factors for skin cancer include fair skin, red hair, a history of sunburns, many moles and/or a family history.
Research has shown the public would be mostly accepting of a risk-tailored approach to screening for melanoma.
There are moves underway to establish a national targeted skin cancer screening program in Australia, with the government recently pledging $10.3 million to help tackle “the most common cancer in our sunburnt country, skin cancer” by focusing on those at greater risk.
Currently, Australian clinical practice guidelines recommend doctors properly evaluate all patients for their future risk of melanoma.
Looking with new technological eyes
Technological advances are improving the accuracy of skin cancer diagnosis and risk assessment.
For example, researchers are investigating 3D total body skin imaging to monitor changes to spots and moles over time.
Artificial intelligence (AI) algorithms can analyse images of skin lesions, and support doctors’ decision making.
Genetic testing can now identify risk markers for more personalised screening.
And telehealth has made remote consultations possible, increasing access to specialists, particularly in rural areas.
Check yourself – 4 things to look for
Skin cancer can affect all skin types, so it’s a good idea to become familiar with your own skin. The Skin Cancer College Australasia has introduced a guide called SCAN your skin, which tells people to look for skin spots or areas that are:
1. sore (scaly, itchy, bleeding, tender) and don’t heal within six weeks
2. changing in size, shape, colour or texture
3. abnormal for you and look different or feel different, or stand out when compared to your other spots and moles
4. new and have appeared on your skin recently. Any new moles or spots should be checked, especially if you are over 40.
If something seems different, make an appointment with your doctor.
You can self-assess your melanoma risk online via the Melanoma Institute Australia or QIMR Berghofer Medical Research Institute.
H. Peter Soyer, Professor of Dermatology, The University of Queensland; Anne Cust, Professor of Cancer Epidemiology, The Daffodil Centre and Melanoma Institute Australia, University of Sydney; Caitlin Horsham, Research Manager, The University of Queensland, and Monika Janda, Professor in Behavioural Science, The University of Queensland
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Hate salad or veggies? Just keep eating them. Here’s how our tastebuds adapt to what we eat
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Do you hate salad? It’s OK if you do, there are plenty of foods in the world, and lots of different ways to prepare them.
But given almost all of us don’t eat enough vegetables, even though most of us (81%) know eating more vegetables is a simple way to improve our health, you might want to try.
If this idea makes you miserable, fear not, with time and a little effort you can make friends with salad.
Why don’t I like salads?
It’s an unfortunate quirk of evolution that vegetables are so good for us but they aren’t all immediately tasty to all of us. We have evolved to enjoy the sweet or umami (savoury) taste of higher energy foods, because starvation is a more immediate risk than long-term health.
Vegetables aren’t particularly high energy but they are jam-packed with dietary fibre, vitamins and minerals, and health-promoting compounds called bioactives.
Those bioactives are part of the reason vegetables taste bitter. Plant bioactives, also called phytonutrients, are made by plants to protect themselves against environmental stress and predators. The very things that make plant foods bitter, are the things that make them good for us.
Unfortunately, bitter taste evolved to protect us from poisons, and possibly from over-eating one single plant food. So in a way, plant foods can taste like poison.
For some of us, this bitter sensing is particularly acute, and for others it isn’t so bad. This is partly due to our genes. Humans have at least 25 different receptors that detect bitterness, and we each have our own genetic combinations. So some people really, really taste some bitter compounds while others can barely detect them.
This means we don’t all have the same starting point when it comes to interacting with salads and veggies. So be patient with yourself. But the steps toward learning to like salads and veggies are the same regardless of your starting point.
It takes time
We can train our tastes because our genes and our receptors aren’t the end of the story. Repeat exposures to bitter foods can help us adapt over time. Repeat exposures help our brain learn that bitter vegetables aren’t posions.
And as we change what we eat, the enzymes and other proteins in our saliva change too. This changes how different compounds in food are broken down and detected by our taste buds. How exactly this works isn’t clear, but it’s similar to other behavioural cognitive training.
Add masking ingredients
The good news is we can use lots of great strategies to mask the bitterness of vegetables, and this positively reinforces our taste training.
Salt and fat can reduce the perception of bitterness, so adding seasoning and dressing can help make salads taste better instantly. You are probably thinking, “but don’t we need to reduce our salt and fat intake?” – yes, but you will get more nutritional bang-for-buck by reducing those in discretionary foods like cakes, biscuits, chips and desserts, not by trying to avoid them with your vegetables.
Adding heat with chillies or pepper can also help by acting as a decoy to the bitterness. Adding fruits to salads adds sweetness and juiciness, this can help improve the overall flavour and texture balance, increasing enjoyment.
Pairing foods you are learning to like with foods you already like can also help.
The options for salads are almost endless, if you don’t like the standard garden salad you were raised on, that’s OK, keep experimenting.
Experimenting with texture (for example chopping vegetables smaller or chunkier) can also help in finding your salad loves.
Challenge your biases
Challenging your biases can also help the salad situation. A phenomenon called the “unhealthy-tasty intuition” makes us assume tasty foods aren’t good for us, and that healthy foods will taste bad. Shaking that assumption off can help you enjoy your vegetables more.
When researchers labelled vegetables with taste-focused labels, priming subjects for an enjoyable taste, they were more likely to enjoy them compared to when they were told how healthy they were.
The bottom line
Vegetables are good for us, but we need to be patient and kind with ourselves when we start trying to eat more.
Try working with biology and brain, and not against them.
And hold back from judging yourself or other people if they don’t like the salads you do. We are all on a different point of our taste-training journey.
Emma Beckett, Senior Lecturer (Food Science and Human Nutrition), School of Environmental and Life Sciences, University of Newcastle
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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End the Insomnia Struggle – by Dr. Colleen Ehrnstrom and Dr. Alisha Brosse
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We’ve reviewed sleep books before, and we always try to recommend books that have something a little different than the rest, so what makes this one stand out?
While there is the usual quick overview of the basics that we’re sure you already know (sleep hygiene etc), most of the attention here is given to cold, hard clinical psychology… in a highly personalized way.
How, you may ask, can they personalize a book, that is the same for everyone?
The answer is, by guiding the reader through examining our own situation. With template logbooks, worksheets, and the like—for this reason we recommend getting a paper copy of the book, rather than the Kindle version, in case you’d like to use/photocopy those.
Essentially, reading this book is much like having your own psychologist (or two) to guide you through finding a path to better sleep.
The therapeutic approach, by the way, is a combination of Cognitive Behavioral Therapy (CBT) and Acceptance-Commitment Therapy (ACT), which work very well together here.
Bottom line: if you’ve changed your bedsheets and turned off your electronic devices and need something a little more, this book is the psychological “big guns” for removing the barriers between you and good sleep.
Click here to check out End the Insomnia Struggle, and end yours once and for all!
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Cottage Cheese vs Ricotta – Which is Healthier?
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Our Verdict
When comparing cottage cheese to ricotta, we picked the ricotta.
Why?
Cottage cheese is a famous health food, mostly for being a low-fat, low-carb, source of protein. And yet, ricotta beats it in most respects.
Looking at the macros first, cottage cheese has more carbs, while ricotta has more protein and fat. The fat profile is pretty much the same, and in both cases it’s two thirds saturated fat, which isn’t good in either case, but cottage cheese has less overall fat which means less saturated fat in total even if the percentage is the same. Because the difference in carbs and protein is not large, while ricotta has considerably more fat, we’ll call this category a win for cottage cheese.
In terms of vitamins, cottage cheese has more of vitamins B1, B5, and B12, while ricotta has more of vitamins A, B2, B3, B9, D, E, and K, so this one’s a win for ricotta.
In the category of minerals, cottage cheese has slightly more copper, while ricotta has much more calcium, iron, magnesium, manganese, potassium, selenium, and zinc. In particular, 2.5x more calcium, and 5x more iron! An easy and clear win for ricotta here.
Taking everything into account: yes, cottage cheese has less fat (and thus, in total, less saturated fat, although the percentage is the same), but that doesn’t make up for ricotta winning in pretty much every other respect. Still, enjoy either or both (in moderation!) if you be so inclined.
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