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neuroscience

a woman standing in a field of sunflowers

A man and his wife go to a party. They gallivant around, interact with various people, and have a few cocktails. On the car ride home, the wife (we'll call her Heather) says something like, "I can't believe Gemma is so annoyed with John." The husband (we'll call him Doug) is perplexed. "What are you talking about?" Heather persists, "What are YOU talking about? She can't STAND him."

Now, taking out all possible outside factors (like their alcohol intake, etc.), this might be a scenario you've seen before. (Of course, those genders can always be switched. Similarly, in same-sex couples, there's a spectrum of personality traits that are far from absolute.) But very often, we hear the trope of the extremely perceptive woman versus the less-than-perceptive man.

man and womanFile:Man-and-woman-icon.svg - Wikimedia Commonscommons.wikimedia.org

There are actual reasons for this. The idea of a physical difference between the male and female brain is nothing new. Numerous self-help books likeMen Are from Mars, Women Are from Venus,You Just Don't Understand: Men and Women in Conversation, and Brain Sex: The Real Difference Between Men and Women have flooded our bookstores for ages. They’ve sought to teach us how to be understood through clearer communication and empathy. Of course, this doesn’t refute the fact that upbringing and societal constructs also play a role in how we process information or behave in different scenarios.

It's a complex issue and far from black and white. That said, numerous studies continue to show how differences in brain structures (though tiny they may be!) really make all the difference.

brain Photo by Milad Fakurian on Unsplash

Dr. Judith Orloff, author of The Genius of Empathy: Practical Skills to Heal Your Sensitive Self, Your Relationships, and The World, wrote a piece for Psychology Today entitled"The Neuroscience of Women's Intuition." She shares, "A woman’s corpus callosum, the connective white matter that connects our left and right brain hemispheres, is thicker than a man’s. This gives women better and faster abilities to access each hemisphere, further integrating their emotions and gut feelings with the more logical decision-making functions of the left hemisphere. Women’s brains are optimized for rapid, intuitive decision-making."

What's even more fascinating is that our actual "gut" has connective neurons. Orloff also shares, "Scientists believe intuition operates through the right side of our brain, the brain’s hippocampus, and through our gut (the digestive system has neurons as well)."

So, there’s an actual reason we use the term "gut instinct."

Dr. Kayla Osterhoff often posts fascinating findings on this matter on Instagram. To name a few of the brain physical factors that help make intuition stronger in the female brain, she mentions a "larger mirror neuron system." She explains, "With more active anterior cingulate cortex and superior temporal sulcus areas, women can more accurately interpret nonverbal cues, better anticipate the needs of others, and navigate complex social dynamics."

She also brings up the aforementioned "enhanced communication between the brain's hemispheres" and "higher gray matter volume in the anterior cingulate gyrus, insula, and hippocampus," which help heighten women's empathy and awareness.

woman in white and black polka dot shirt holding blue and white book Photo by No Revisions on Unsplash

And though the science is ever-changing and will hopefully include more studies that differentiate between biological sex and gender identity, the studies consistently back up how different the "male vs. female" brain is. In an even more recent piece by Scott Barry Kaufman called "Male and Female Brains Can Be Classified with Striking Accuracy" , he discusses a scientific study published in PNAS that supports these findings. Their results suggest that, at the group level, male and female brains can be distinguished with a high level of accuracy, and there are particular features of intrinsic organization in these brains that are significant and most likely evolved over the course of human evolution for adaptive purposes." He adds, "All brains don’t have to be equal for there to be equality. Brains can be complementary with equal opportunities for contribution."

In other words, if you're reading this with a confused expression on your face, Heather may more likely pick up on that than Doug.

Science

'Rubber hand illusion' shows how our minds can be manipulated and it's totally trippy

He feels every sensation in his real hand even when it's not being touched.

The rubber hand illusion demonstrates how we can shift how our brain perceives reality.

The human mind is incredibly powerful in fascinating and sometimes terrifying ways. Conmen and cult leaders know how to manipulate people by taking advantage of psychological vulnerabilities and using tricks of the mind. But there are also physical examples of how our brains can be fooled into thinking something is real that isn't, even when we know it's happening.

The "rubber hand illusion" is a prime demonstration of how we can manipulate our brains into experiencing physical sensations—even pain—purely through the power of visual cues and parallel touch.




The way it works is a person sits with their hands palms-down on a table, but with one arm obscured from sight by a board. A rubber hand is placed on the table within sight, visually taking the place of the hidden hand. Someone strokes the hidden real hand and the rubber hand in the exactly same way at the same time while the person watches the rubber hand, and within a minute or so, the person's brain starts to sense the rubber hand as their real hand.

This multisensory trick is powerful. After a short time, even when the real hand is no longer being touched, watching the rubber hand being touched triggers a real physical sensation in the brain. This phenomenon is also called a body transfer illusion, and it's quite entertaining to witness.

Watch it in action:

Super trippy, right?

A group of Italian scientists measured some of the effects of the rubber hand illusion by triggering the electrical impulses in the brain that control hand movement while the person was engaged in the illusion. They found that the strength of the impulses that got through to the hidden hand dropped dramatically, indicating that the brain had reduced its readiness to use the hidden hand.

“This was very surprising for us. The effect is so strong,” said Francesca Garbarini, one of the scientists leading the study, according to The Guardian. “Because the brain no longer considers the hand as part of the body, we become less able to use it.”

The rubber hand illusion has been used to explore how people who have lost limbs might gain psychological ownership over a prosthetic limb. However, not everyone is able to experience the sensations shown in the video. One study of the rubber hand illusion found that only two-thirds of participants were actually susceptible to the rubber hand illusion; the other third were immune.

Still, it's an incredible testament to the power of our minds to change what we think of as reality with just a few simple adjustments to our perception.

Science

Man was awake and playing the saxophone throughout his entire 9-hour brain tumor surgery

Several times during the surgery, the patient played the theme song from "Love Story" by Francis Lai.

"Awake surgery" allows brain surgeons to see the functioning parts of the brain to avoid during surgery.

This article originally appeared on 10.17.22


Do you ever step back and marvel at the miraculous things human beings have figured out how to do?

Less than 200 years ago, no human being had ever played a saxophone, there was no such thing as anesthesia and if you had even a simple brain tumor, you were just out of luck.

Now, a team of doctors in Italy has successfully performed a highly complex, nine-hour brain surgery on a man while he was awake and while he played the saxophone. Not only that, but the patient reported feeling "tranquility" during the surgery and only spent a few days in the hospital after the surgery before being discharged.


According to CBS News, a 35-year-old male patient had a brain tumor removed at Paideia International Hospital in Rome, Italy, on October 10. The surgery was led by Dr. Christian Brogna, a neurosurgeon who specializes in complex cancer surgeries and "awake surgery," in which patients are not put under general anesthesia. According to the Mayo Clinic, certain brain surgeries actually require a patient to be awake and responsive during the procedure to lessen the risk of the surgery damaging areas of the brain that could affect vision, movement or speech.

Dr. Brogna told CBS News that this particular surgery was located in "a very, very complex area of the brain" and also pointed out that the patient is left-handed. "This makes things more complicated because the neural pathways of the brain are much more complicated," he said. Recent research shows that left-handed people differ in brain asymmetry from right-handed people and that the right and left hemispheres of the brain tend to be more connected in people who are left-handed.

The team of 10 who successfully completed the surgery was made up of neurosurgeons, anesthesiologists, neuropsychologists, neurophysiologists and engineers from around the world. Though other awake craniotomies that included a patient playing a musical instrument have been done before, the level of complexity and cutting-edge technologies used in this surgery made it a notable accomplishment.

Why the saxophone? The man had told the surgeons that retaining his musical abilities was of the utmost importance to him.

"Awake surgery makes it possible to map with extreme precision during surgery the neuronal networks that underlie the various brain functions such as playing, speaking, moving, remembering, counting," Brogna said in the hospital's news release. Playing music during the surgery gave the surgeons a visual of where those functions were in the patient's brain and helped them ensure they were keeping them intact.

Several times during the surgery, the patient played the theme song from "Love Story" by Francis Lai and the Italian national anthem on his saxophone. (You can watch him playing in the video below shared by Voice of America.)

"To play an instrument means that you can understand music, which is a high cognitive function," Brogna told CBS News. "It means you can interact with the instrument, you can coordinate both hands, you can exercise memory, you can count — because music is mathematics — you can test vision because the patient has to see the instrument, and you can test the way the patient interacts with the rest of the team," he said.

Such surgeries require intense preplanning and familiarity with the patient's normal functioning, and the team met with the patient six or seven times in the 10 days leading up to the surgery.

"When we operate on the brain, we are operating on the sense of self, so we need to make sure that we do not damage the patient as a person — their personality, the way they feel emotions, the way they get through life," Brogna told CBS News. "The patient will tell you what is important in his life and it is your job to protect his wishes."

As amazing as surgery like this is, Brogna reminds us that there's still so much we don't know about the way the brain works. Prodecures like this one help doctors learn in addition to helping patients.

"Each operation in awake surgery not only allows to obtain the maximum result in terms of removal of the pathology, but it is a real discovery," Brogna said in the hospital's news release. "Each time it offers us a window into the functioning of this fascinating, but still in many ways mysterious organ, which is the brain."

Family

America's favorite science teacher Bill Nye explains how your dreams work.

You know emojis have taken over when scientists use them to explain how things work.

In a new series from Mashable, Bill Nye, America's favorite science teacher takes a look at the science of dreaming.

When you turn off your alarm clock in the morning, your day is just beginning. You're groggy. You're tired. You hit snooze like a million times (if you're me). But you're awake.

Your brain, on the other hand, never went to sleep. It was busy working the overnight shift.


We've all been there. Image via iStock.

Sometimes you wake up and your dreams from the night before are so vivid. Sometimes they're just straight up bizarre. And sometimes you can't recall them at all.

The average person dreams about four to six times a night, so whether or not you remember them, if you're sleeping, your brain is busy dreaming.

Basically, it's always up to something. One brain would never walk up to another and be like, "Hey brain, what's up?" and receive an "Oh, not much" in response. It'd be more like ... "EVERYTHING IS UP! ALL THE TIME! I'M A BRAIN!"

Or to put the beautifully complex behavior of the brain simply...

Bill Nye has found the perfect emojis to explain just what the heck your brain gets up to at night.

GIF via Mashable Watercooler/YouTube.

Basically, neurologists say your brain can be found in three states:

1. Your brain is AWAKE!

That's your brain RIGHT NOW! That's why you're reading this! And getting lost in Wikipedia rabbit holes and getting distracted by the Internet and living your life. I can't even explain it more because it's so obvious! You're awake! And your brain is too!

She's awake! GIF from "30 Rock."

2. Your brain is in a rapid eye-movement (REM) cycle.

This is a fun one. This is when things start to get weird and dreamy. This is the part of your sleep sleep cycle where your eyes start to move rapidly (ha! rapid eye movement! get it??) and your body goes through many physiological changes. Your limbs become limp and your breathing becomes irregular. This, believe it or not, is the perfect condition for dreaming.

When you're in the REM state, your imagination runs wild. GIF via Mashable Watercooler/YouTube.



3. Your brain is in the non-rapid-eye movement (NREM) cycle.

Non-rapid eye movement doesn't sound as fun because it's considered dreamless sleep, but it takes up more of your life than REM. So you should get to know it.

About 80% of your sleep takes place in NREM. This is when your breathing and heart rate are slow and regular and you are pretty still. This is most likely not the time when you are talking in your sleep or rolling around stealing the covers from your partner. Which they definitely appreciate, by the way.

Word of the day: extrastriate. GIF via Mashable Watercooler/YouTube.

Nye briefly touches on this, but humans aren't the only ones who experience dreams. Animals likely do too.

Most mammals experience rapid-eye movement, so "it is reasonable to suppose that animals have something like what we call dreams," Patrick McNamara, director of the Evolutionary Neurobehavior Laboratory at Boston University, told National Geographic. That's pretty cool to think about.

Scientists are busy discovering more about how the brain works in humans and in animals.

From the amount of sleep disorders faced every day to the effects smartphones may have when you're trying to get some shut-eye, we're giving scientists plenty of material to work with.

While we wait to learn more, just try to get a decent amount of sleep at night. Netflix will be there in the morning. And besides, you're clearly awesome at dreaming, so DREAM BIG.

Here's Bill Nye to explain more about your dreams: