The Twenty-Four Hour Mind – by Dr. Rosalind Cartwright

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We’ve reviewed books about sleep before, and even about dreaming, so what does this one have to offer that’s new?

Quite a lot, actually! Before Dr. Cartwright, there were mainly two models of sleep and dreaming:

  • The “top-down” model of psychoanalysts: our minds shape our dreams which in turn reveal things about us as people
  • The “bottom-up” model of neuroscientists: our brains need to go through regular maintaince cycles, of which vivid hallucinations are a quirky side-effect.

And now, as Dr. Cartwright puts it:

❝I will lay out a new [horizontal] psychological model of the twenty-four hour mind; that is, how the predominantly conscious (waking) and unconscious (sleeping) forms of mental behavior interact through the brain’s regular, but differently organized, states of waking, sleeping, and dreaming.❞

This she does in the exploratory style of a 224-page lecture, which sounds like it might be tedious, but is actually attention-grabbing and engaging throughout. This book is more of a page-turner than soporific bedtime reading!

Bottom line: if you’d like to know more about the effect your waking and sleeping brain have on each other (to include getting in between those and making adjutments as appropriate), this is very much an elucidating read!

Click here to check out The Twenty-Four Hour Mind, and learn more about yours!

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  • The Dopamine Myth
    The Dopamine Myth: Don’t believe the misconception that dopamine is the cause of addictions. It plays a role in pleasure, motivation, learning, and more. Find healthier ways to boost dopamine levels.

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  • Why You Can’t Just “Get Over” Trauma

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    Time does not, in fact, heal all wounds. Sometimes they even compound themselves over time. Dr. Tracey Marks explains the damage that trauma does—the physiological presentation of “the axe forgets but the tree remembers”—and how to heal from that actual damage.

    The science of healing

    Trauma affects the mind and body (largely because the brain is, of course, both—and affects pretty much everything else), which can ripple out into all areas of life.

    On the physical level, brain areas affected by trauma include:

    • Amygdalae: becomes hyperactive, keeping a person in a heightened state of vigilance.
    • Hippocampi: can shrink, causing fragmented or missing memories.
    • Prefrontal cortex: reduces in activity, impairing decision-making and emotional regulation.

    Trauma also activates the body’s fight or flight response, releasing stress hormones like cortisol and adrenaline. These are great things to have a pinch, but having them elevated all the time is equivalent to only ever driving your car at top speed—the only question becomes whether you’ll crash and burn before you break down.

    However, there is hope! Neuroplasticity (the brain’s ability to rewire itself) can make trauma recovery possible through various interventions.

    Evidence-based therapies for trauma include:

    • Eye Movement Desensitization and Reprocessing (EMDR): this can help reprocess traumatic memories and reduce emotional intensity.
    • Trauma-focused Cognitive Behavioral Therapy (CBT): this can help change unhelpful thought patterns and includes exposure therapy.
    • Somatic therapies: these focus on the body and nervous system to release stored tension.

    In this latter category, embodiment is key to trauma recovery—this may sound “wishy-washy”, but the evidence shows that reconnecting with the body does help manage emotional stress responses. Mind-body practices like mindfulness, yoga, and breathwork help cultivate embodiment and reduce trauma-related stress.

    In short: you can’t just “get over” it, but with the right support and interventions, it’s possible to rewire the brain and body toward resilience and healing.

    For more on all of this from Dr. Marks, enjoy:

    Click Here If The Embedded Video Doesn’t Load Automatically!

    Want to learn more?

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  • Two Things You Can Do To Improve Stroke Survival Chances

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    Dr. Andrew’s Stroke Survival Guide

    This is Dr. Nadine Andrew. She’s a Senior Research Fellow in the Department of Medicine at Monash University. She’s the Research Data Lead for the National Center of Healthy Aging. She is lead investigator on the NHMRC-funded PRECISE project… The most comprehensive stroke data linkage study to date! In short, she knows her stuff.

    We’ve talked before about how sample size is important when it comes to scientific studies. It’s frustrating; sometimes we see what looks like a great study until we notice it has a sample size of 17 or something.

    Dr. Andrew didn’t mess around in this regard, and the 12,386 participants in her Australian study of stroke patients provided a huge amount of data!

    With a 95% confidence interval because of the huge dataset, she found that there was one factor that reduced mortality by 26%.

    And the difference was…

    Whether or not patients had a chronic disease management plan set up with their GP (General Practitioner, or “family doctor”, in US terms), after their initial stroke treatment.

    45% of patients had this; the other 55% did not, so again the sample size was big for both groups.

    Why this is important:

    After a stroke, often a patient is discharged as early as it seems safe to do so, and there’s a common view that “it just takes time” and “now we wait”. After all, no medical technology we currently have can outright repair that damage—the body must repair itself! Medications—while critical*—can only support that and help avoid recurrence.

    *How critical? VERY critical. Critical critical. Dr. Andrew found, some years previously, that greater levels of medication adherence (ie, taking the correct dose on time and not missing any) significantly improved survival outcomes. No surprise, right? But what may surprise is that this held true even for patients with near-perfect adherence. In other words: miss a dose at your peril. It’s that important.

    But, as Dr. Andrew’s critical research shows, that’s no reason to simply prescribe ongoing meds and otherwise cut a patient loose… or, if you or a loved one are the patient, to allow yourself/them to be left without a doctor’s ongoing active support in the form of a chronic disease management plan.

    What does a chronic disease management plan look like?

    First, what it’s not:

    • “Yes yes, I’m here if you need me, just make an appointment if something changes”
    • “Let’s pencil in a check-up in three months”
    • Etc

    What it actually looks like:

    It looks like a plan. A personal care plan, built around that person’s individual needs, risks, liabilities… and potential complications.

    Because who amongst us, especially at the age where strokes are more likely, has an uncomplicated medical record? There will always be comorbidities and confounding factors, so a one-size-fits-all plan will not do.

    Dr. Andrew’s work took place in Australia, so she had the Australian healthcare system in mind… We know many of our subscribers are from North America and other places. But read this, and you’ll see how this could go just as much for the US or Canada:

    ❝The evidence shows the importance of Medicare financially supporting primary care physicians to provide structured chronic disease management after a stroke.

    We also provide a strong case for the ongoing provision of these plans within a universal healthcare system. Strategies to improve uptake at the GP level could include greater financial incentives and mandates, education for patients and healthcare professionals.❞

    See her groundbreaking study for yourself here!

    The Bottom Line:

    If you or a loved one has a stroke, be prepared to make sure you get a chronic health management plan in place. Note that if it’s you who has the stroke, you might forget this or be unable to advocate for yourself. So, we recommend to discuss this with a partner or close friend sooner rather than later!

    “But I’m quite young and healthy and a stroke is very unlikely for me”

    Good for you! And the median age of Dr. Andrew’s gargantuan study was 70 years. But:

    • do you have older relatives? Be aware for them, too.
    • strokes can happen earlier in life too! You don’t want to be an interesting statistic.

    Some stroke-related quick facts:

    Stroke is the No. 5 cause of death and a leading cause of disability in the U.S.

    Stroke can happen to anyone—any age, any time—and everyone needs to know the warning signs.

    On average, 1.9 million brain cells die every minute that a stroke goes untreated.

    Stroke is an EMERGENCY. Call 911 immediately.

    Early treatment leads to higher survival rates and lower disability rates. Calling 911 lets first responders start treatment on someone experiencing stroke symptoms before arriving at the hospital.

    Source: https://www.stroke.org/en/about-stroke

    What are the warning signs for stroke?

    Use the letters F.A.S.T. to spot a stroke and act quickly:

    • F = Face Drooping—does one side of the face droop or is it numb? Ask the person to smile. Is the person’s smile uneven?
    • A = Arm Weakness—is one arm weak or numb? Ask the person to raise both arms. Does one arm drift downward?
    • S = Speech Difficulty—is speech slurred?
    • T = Time to call 911

    Source: https://www.stroke.org/en/about-stroke/stroke-symptoms

    Last but not least, while we’re sharing resources:

    Download the PDF Checklist: 8 Ways To Help Prevent a Second Stroke

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  • 7 Kinds Of Rest When Sleep Is Not Enough

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    Taking Rest Seriously (More Than Just Sleep)

    This is Dr. Matthew Edlund. He has 44 years experience as a psychiatrist, and is also a sleep specialist. He has a holistic view of health, which is reflected in his practice; he advocates for “a more complete health: physical, mental, social, and spiritual well-being”.

    What does he want us to know?

    Sleep, yes

    Sleep cannot do all things for us in terms of rest, but it can do a lot, and it is critical. It is, in short, a necessary-but-not-sufficient condition for being well-rested.

    See also: Why You Probably Need More Sleep

    Rest actively

    Rest is generally thought of as a passive activity, if you’ll pardon the oxymoron. Popular thinking is that it’s not something defined by what we do, so much what we stop doing.

    In contrast, Dr. Edlund argues that to take rest seriously, we need do restful things.

    Rest is as important as eating, and we wouldn’t want for that to “just happen”, would we?

    Dr. Edlund advocates for restful activities such as going to the garden (or a nearby park) to relax. He also suggests we not underestimate the power of sex as an actively restful activity—this one is generally safer in the privacy of one’s home, though!

    Rest physically

    This is about actively relaxing our body—yoga is a great option here, practised in a way that is not physically taxing, but is physically rejuvenating; gentle stretches are key. Without such things, our body will keep tension, and that is not restful.

    For the absolute most restful yogic practice? Check out:

    Non-Sleep Deep Rest: A Neurobiologist’s Take

    this is about yoga nidra!

    Rest mentally

    The flipside of the above is that we do need to rest our mind also. When we try to rest from a mental activity by taking on a different mental activity that uses the same faculties of the brain, it is not restful.

    Writer’s example: as a writer, I could not rest from my writing by writing recreationally, or even by reading. An accountant, however, could absolutely rest from accounting by picking up a good book, should they feel so inclined.

    Rest socially

    While we all have our preferences when it comes to how much or how little social interaction we like in our lives, humans are fundamentally social creatures, and it is hardwired into us by evolution to function at our best in a community.

    This doesn’t mean you have to go out partying every night, but it does mean you should take care to spend at least a little time with friends, even if just once or twice per week, and yes, even if it’s just a videocall (in person is best, but not everyone lives close by!)

    If your social life is feeling a little thin on the ground these days, that’s a very common thing—not only as we get older, but also as many social institutions took a dive in functionality on account of the pandemic, and many are still floundering. Nevertheless, there are more options than you probably realize; yes, even for the naturally reclusive:

    How To Beat Loneliness & Isolation

    Rest spiritually

    Be we religious or not, there are scientifically well-evidenced benefits to religious practices—some are because of the social aspect, and follow on from what we talked about just above. Other benefits come from activities such as prayer or meditation (which means that having some kind of faith, while beneficial, is not actually a requirement for spiritual rest—comparable practices without faith are fine too).

    We discussed the overlapping practices of prayer and meditation, here:

    The Science Of Mantra Meditation

    Rest at home

    Obviously, most people sleep at home. But…

    Busy family homes can sometimes need a bit of conscious effort to create a restful environment, even if just for a while. A family dinner together is one great way to achieve this, and also ties in with the social element we mentioned before!

    A different challenge faced by a lot of older people without live-in families, on the other hand, is the feeling of too much opportunity for rest—and then a feeling of shame for taking it. The view is commonly held that, for example, taking an afternoon nap is a sign of weakness.

    On the contrary: taking an afternoon nap can be a good source of strength! Check out:

    How To Nap Like A Pro (No More “Sleep Hangovers”!)

    Rest at work

    Our readership has a lot of retirees, but we know that’s not the case for everyone. How then, to rest while at work? Ideally we have breaks, of course, but most workplaces do not exactly have an amusement arcade in the break room. Nevertheless, there are some quick resets that can be done easily, anywhere, and (almost) any time:

    Meditation Games: Meditation That You’ll Actually Enjoy

    Want to know more?

    You might also like:

    How To Rest More Efficiently (Yes, Really)

    Take care!

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  • Lettuce vs Arugula – Which is Healthier?

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    Our Verdict

    When comparing lettuce to arugula, we picked the arugula.

    Why?

    These two salad leaves that often fulfil quite similar culinary roles (base of a green salad) are actually of different families, and it shows…

    In terms of macros, arugula is lower in carbs, and much higher in protein and fiber—to the point that the protein content in arugula is almost equal to the carb content, which for leaves, is not that common a thing to see.

    When it comes to vitamins, things are more even: lettuce has more of vitamins A, B1, B3, B6, and K, while arugula has more of vitamins B5, B9, C, E, and choline. All in all, we can comfortably call it a tie on the vitamin front.

    In the category of minerals, things are once again more decided: arugula has more calcium, copper, iron, magnesium, manganese, phosphorus, potassium, and zinc. In contrast, lettuce boasts only more selenium. An easy win for arugula.

    Both of these plants have plenty of health-giving phytochemicals, including flavonoids and carotenoids along with other less talked-about things, and while the profiles are quite different for each of them, they stack up about the same in terms of overall benefits in this category.

    Taking the various categories into account, this of course adds up to an easy win for arugula, but do enjoy both, especially as lettuce brings benefits that arugula doesn’t in the two categories where they tied!

    Want to learn more?

    You might like to read:

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  • Mammography AI Can Cost Patients Extra. Is It Worth It?

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    As I checked in at a Manhattan radiology clinic for my annual mammogram in November, the front desk staffer reviewing my paperwork asked an unexpected question: Would I like to spend $40 for an artificial intelligence analysis of my mammogram? It’s not covered by insurance, she added.

    I had no idea how to evaluate that offer. Feeling upsold, I said no. But it got me thinking: Is this something I should add to my regular screening routine? Is my regular mammogram not accurate enough? If this AI analysis is so great, why doesn’t insurance cover it?

    I’m not the only person posing such questions. The mother of a colleague had a similar experience when she went for a mammogram recently at a suburban Baltimore clinic. She was given a pink pamphlet that said: “You Deserve More. More Accuracy. More Confidence. More power with artificial intelligence behind your mammogram.” The price tag was the same: $40. She also declined.

    In recent years, AI software that helps radiologists detect problems or diagnose cancer using mammography has been moving into clinical use. The software can store and evaluate large datasets of images and identify patterns and abnormalities that human radiologists might miss. It typically highlights potential problem areas in an image and assesses any likely malignancies. This extra review has enormous potential to improve the detection of suspicious breast masses and lead to earlier diagnoses of breast cancer.

    While studies showing better detection rates are extremely encouraging, some radiologists say, more research and evaluation are needed before drawing conclusions about the value of the routine use of these tools in regular clinical practice.

    “I see the promise and I hope it will help us,” said Etta Pisano, a radiologist who is chief research officer at the American College of Radiology, a professional group for radiologists. However, “it really is ambiguous at this point whether it will benefit an individual woman,” she said. “We do need more information.”

    The radiology clinics that my colleague’s mother and I visited are both part of RadNet, a company with a network of more than 350 imaging centers around the country. RadNet introduced its AI product for mammography in New York and New Jersey last February and has since rolled it out in several other states, according to Gregory Sorensen, the company’s chief science officer.

    Sorensen pointed to research the company conducted with 18 radiologists, some of whom were specialists in breast mammography and some of whom were generalists who spent less than 75% of their time reading mammograms. The doctors were asked to find the cancers in 240 images, with and without AI. Every doctor’s performance improved using AI, Sorensen said.

    Among all radiologists, “not every doctor is equally good,” Sorensen said. With RadNet’s AI tool, “it’s as if all patients get the benefit of our very top performer.”

    But is the tech analysis worth the extra cost to patients? There’s no easy answer.

    “Some people are always going to be more anxious about their mammograms, and using AI may give them more reassurance,” said Laura Heacock, a breast imaging specialist at NYU Langone Health’s Perlmutter Cancer Center in New York. The health system has developed AI models and is testing the technology with mammograms but doesn’t yet offer it to patients, she said.

    Still, Heacock said, women shouldn’t worry that they need to get an additional AI analysis if it’s offered.

    “At the end of the day, you still have an expert breast imager interpreting your mammogram, and that is the standard of care,” she said.

    About 1 in 8 women will be diagnosed with breast cancer during their lifetime, and regular screening mammograms are recommended to help identify cancerous tumors early. But mammograms are hardly foolproof: They miss about 20% of breast cancers, according to the National Cancer Institute.

    The FDA has authorized roughly two dozen AI products to help detect and diagnose cancer from mammograms. However, there are currently no billing codes radiologists can use to charge health plans for the use of AI to interpret mammograms. Typically, the federal Centers for Medicare & Medicaid Services would introduce new billing codes and private health plans would follow their lead for payment. But that hasn’t happened in this field yet and it’s unclear when or if it will.

    CMS didn’t respond to requests for comment.

    Thirty-five percent of women who visit a RadNet facility for mammograms pay for the additional AI review, Sorensen said.

    Radiology practices don’t handle payment for AI mammography all in the same way.

    The practices affiliated with Boston-based Massachusetts General Hospital don’t charge patients for the AI analysis, said Constance Lehman, a professor of radiology at Harvard Medical School who is co-director of the Breast Imaging Research Center at Mass General.

    Asking patients to pay “isn’t a model that will support equity,” Lehman said, since only patients who can afford the extra charge will get the enhanced analysis. She said she believes many radiologists would never agree to post a sign listing a charge for AI analysis because it would be off-putting to low-income patients.

    Sorensen said RadNet’s goal is to stop charging patients once health plans realize the value of the screening and start paying for it.

    Some large trials are underway in the United States, though much of the published research on AI and mammography to date has been done in Europe. There, the standard practice is for two radiologists to read a mammogram, whereas in the States only one radiologist typically evaluates a screening test.

    Interim results from the highly regarded MASAI randomized controlled trial of 80,000 women in Sweden found that cancer detection rates were 20% higher in women whose mammograms were read by a radiologist using AI compared with women whose mammograms were read by two radiologists without any AI intervention, which is the standard of care there.

    “The MASAI trial was great, but will that generalize to the U.S.? We can’t say,” Lehman said.

    In addition, there is a need for “more diverse training and testing sets for AI algorithm development and refinement” across different races and ethnicities, said Christoph Lee, director of the Northwest Screening and Cancer Outcomes Research Enterprise at the University of Washington School of Medicine. 

    The long shadow of an earlier and largely unsuccessful type of computer-assisted mammography hangs over the adoption of newer AI tools. In the late 1980s and early 1990s, “computer-assisted detection” software promised to improve breast cancer detection. Then the studies started coming in, and the results were often far from encouraging. Using CAD at best provided no benefit, and at worst reduced the accuracy of radiologists’ interpretations, resulting in higher rates of recalls and biopsies.

    “CAD was not that sophisticated,” said Robert Smith, senior vice president of early cancer detection science at the American Cancer Society. Artificial intelligence tools today are a whole different ballgame, he said. “You can train the algorithm to pick up things, or it learns on its own.”

    Smith said he found it “troubling” that radiologists would charge for the AI analysis.

    “There are too many women who can’t afford any out-of-pocket cost” for a mammogram, Smith said. “If we’re not going to increase the number of radiologists we use for mammograms, then these new AI tools are going to be very useful, and I don’t think we can defend charging women extra for them.”

    KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.

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  • Heal & Reenergize Your Brain With Optimized Sleep Cycles

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    Sometimes 8 hours sleep can result in grogginess while 6 hours can result in waking up fresh as a daisy, so what gives? Dr. Tracey Marks explains, in this short video.

    Getting more than Zs in

    Sleep involves 90-minute cycles, usually in 4 stages:

    1. Stage 1: (drowsy state): brief muscle jerks; lasts a few minutes.
    2. Stage 2: (light sleep): sleep spindles for memory consolidation; 50% of total sleep.
    3. Stage 3 (deep sleep): tissue repair, immune support, brain toxin removal via the glymphatic system.
    4. Stage 4 (REM sleep): emotional processing, creativity, problem-solving, and dreaming.

    Some things can disrupt some or all of those. To give a few common examples:

    • Alcohol: impairs REM sleep.
    • Caffeine: hinders deep sleep even if consumed hours before bed.
    • Screentime: delays sleep onset due to blue light (but not by much); the greater problem is that it can also disrupt REM sleep due to mental stimulation.

    To optimize things, Dr. Marks recommends:

    • 90-minute rule: plan sleep to align with full cycles (e.g: 22:30 to 06:00 = 7½ hours, which is 5x 90-minute cycles).
    • Smart alarms: use sleep-tracking apps with built-in alarm, to wake you up during light sleep phases.
    • Strategic naps: keep naps to 20 minutes or a full 90-minute cycle.
    • Pink noise: improves deep sleep.
    • Meal timing: avoid eating within 3 hours of bedtime.
    • Natural light: get morning light exposure in the morning to strengthen circadian rhythm.

    For more on all of this, enjoy:

    Click Here If The Embedded Video Doesn’t Load Automatically!

    Want to learn more?

    You might also like to read:

    Calculate (And Enjoy) The Perfect Night’s Sleep

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