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Brian Roemmele Profile picture
@BrianRoemmele
Jan 5, 2020 • 11 tweets • 5 min read • Read on X
Consider: millions of years ago our antecedents gave a massive sacrifice of their left hemisphere.

We lost a tremendous amount of short term memory and replaced it with Broca’s, Wernicke & the phonological loop.

But why?

So we can—talk.

Thus chimpanzees can do this—we can’t:
Every animal has a limited amount of brain power and size, so every skill and talent has an opportunity cost. This is not controversial or particularly questioned.

The Cognitive Tradeoff hypothesis is about tradeoffs apparent between chimpanzees and human. Image
In 1956 "The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information” by George A. Miller of Harvard University was published.

It was a landmark of human memory research.

Bell Labs adopted memory chunking in phone numbers (xxx)-xxx-xxxx Image
Consider Kim Peek.

He had a skill that would surpass the abilities of the chimpanzees.

He had suffered damage through encephalitis to the corpus colosseum.

I wrote about him here on Quora:

You may know him:

His name was Rain Man in a popular movie. quora.com/Is-the-ability…
This chimpanzee research was performed for over 30 years by Tetsuro Matsuzawa, PhD, Distinguished Professor, Kyoto University Institute for Advanced Study, Professor, Primate Research Institute of Kyoto University, Coordinator.

There is much to his work.
matsuzawa.kyoto/cv/en/
Ode to the brain by the astonishing @musicalscience

It is a good time to watch this...
Many folks have asked me about more dimensions to brain research.

There are many paths and this is one that is a great start.

I did an Interview with Tor Nørretranders on his book The User Illusion.

He surfaced other astonishing elements to our brain.

soundcloud.com/aroundthecoin/…
Lots of folks asking about Kim Peek and makes this thread most interesting.

We have seen short term memory of chimpanzees but with Kim Peek we see the other side—of human long term memory and what our brain is capable of.

Here is how Kim’s life began:
A particularly good time to watch this.


A word about long term memory: REM sleep is required to retain/lose non-emotionally connected long-term memories.

Melanin-concentrating hormone-producing neurons in the hypothalamus erase/save memory while sleeping.

Here is an astonishing study on MCH:

science.sciencemag.org/content/365/64…
I think this is the best place to leave this thread.

@drbronowski Dr. Jacob Bronowski on the brain:


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More from @BrianRoemmele

Brian Roemmele Profile picture
Apr 10
For over seven centuries, the fishermen of Oostduinkerke, Belgium, have been training sturdy draft horses to assist them in catching shrimp.

🧵 Image
These horses, often weighing more than 2,000 pounds, are perfectly suited for wading through the chilly waters of the North Sea. However, despite its rich history, Oostduinkerke remains the last place on Earth where this unique fishing method is still practiced.

2 of 🧵 Image
Shrimp fishing on horseback is considered one of the most challenging fishing techniques ever devised, as it demands expertise in handling both massive horses and delicate shrimp.

3 of 🧵
Read 5 tweets
Brian Roemmele Profile picture
Jan 19
A bullet vs A Prince Rupert's Drop.

A THREAD 🧵

1/
The Fascinating Mechanics of Prince Rupert’s Drop

Prince Rupert’s Drop is a remarkable demonstration of material science and physics, showcasing the fascinating interplay of stress, structure, and energy. This seemingly simple glass object—a teardrop-shaped piece of solidified glass—holds a secret: it combines extreme strength with profound fragility, depending on where and how it’s tested.

What is Prince Rupert’s Drop?

Prince Rupert’s Drop is created by dropping molten glass into cold water. The rapid cooling causes the outer layer of the glass to solidify almost instantaneously, while the interior cools more slowly. This process induces significant internal stresses in the glass, resulting in the drop’s unique mechanical properties. The structure consists of two main parts:
1.The Bulb: The rounded, thicker end of the drop is extraordinarily strong.
2.The Tail: The thin, extended end of the drop is incredibly fragile.

Why Is the Bulb So Strong?

The strength of the bulb arises from compressive stress. During formation, the outer surface of the glass cools and hardens first, trapping the inner material, which continues to contract as it cools. This creates a state where the outer layer is under compression and the inner layer is under tension.

Compressive stress significantly enhances the material’s ability to resist fracture. In the case of Prince Rupert’s Drop, the compressive strength of the glass bulb is so high that it can withstand impacts, including being struck with a hammer, without breaking.

The Fragility of the Tail

While the bulb is incredibly strong, the thin tail of the drop is under extreme tensile stress. Glass is inherently much weaker in tension than in compression. A slight nick or disturbance to the tail acts as a stress concentrator, causing the entire structure to rapidly release its stored energy. This results in the drop shattering into countless tiny fragments almost instantly.

The phenomenon is explained by the propagation of cracks. Any disturbance to the tail initiates a stress wave that travels through the drop at speeds of up to 1,450 meters per second (faster than the speed of sound in glass), disintegrating it completely.

2/Image
Applications and Relevance

Prince Rupert’s Drop serves as a dramatic illustration of material properties like stress distribution, energy storage, and fracture mechanics. It has applications in:
•Material Science Education: A vivid way to teach the principles of stress and fracture mechanics.
•Engineering: Inspiring the design of materials and structures with tailored stress distributions to enhance strength and durability.
•Shock-Absorbing Materials: Lessons from the compressive stress distribution in the bulb could inform the development of robust, impact-resistant materials.

Experimental Studies

Modern studies on Prince Rupert’s Drop leverage high-speed photography and advanced computational models to analyze the stress distribution and fracture dynamics. Key findings include:
•The outer compressive layer is only microns thick, but it significantly contributes to the drop’s strength.
•The release of stored energy during fracture creates a cascading effect, making the disintegration nearly instantaneous.

Prince Rupert’s Drop is a perfect example of how materials can exhibit seemingly contradictory properties of strength and fragility. Its study bridges art, physics, and engineering, offering insights into stress management and fracture behavior that can be applied to modern technological advancements. Despite its simplicity, this 17th-century curiosity continues to captivate scientists and engineers alike, proving that even the smallest objects can reveal profound scientific truths.Image
Read 4 tweets
Brian Roemmele Profile picture
Jan 19
Does TikTok Cause Cognitive Decline? A Critical Examination of Research.

A THREAD 🧵🪡

—

In recent years, the rise of short-form content platforms like TikTok has prompted discussions about their potential impact on cognitive health.

1/ Image
A widely debated topic is whether the platform’s fast-paced, hyper personalized AI algorithm-driven content consumption contributes to what some users term “brain rot”—a colloquial term for reduced attention span, memory retention, or critical thinking skills.

2/ Image
A University of Michigan study published in Science Advances examined the effects of “content switching” on brain function, finding that frequent transitions between short, unrelated content streams can disrupt sustained attention and impair memory consolidation (Mark et al., 2021).

3/Image
Read 11 tweets
Brian Roemmele Profile picture
Sep 25, 2024
This is the story of how Edward Bernays with the help of his uncle Sigmund Freud changed your mind in ways that you may never discover.

In this 4 part series The Century of the Self you will begin to see how we live in the Bernays world.

Part 1:

Edward Bernays.

Part 2:

Edward Bernays.

Part 3:
Read 4 tweets
Brian Roemmele Profile picture
Sep 25, 2024
This is one of the most important movies you can watch at this very moment.

Take the hour and learn about the Edward Bernays world you and I live in.

From a VHS tape for you to see today.

Be ready to understand how you and I have been played.
This is a continuation of the most important movies you can watch at this very moment.

Take the hour and learn about the Edward Bernays world you and I live in.

From a VHS tape for you to see today.

Be ready to understand how you and I have been played.
This is a part 3 of the most important movies you can watch at this very moment.

Take the hour and learn about the Edward Bernays world you and I live in.

From a VHS tape for you to see today.

Be ready to understand how you and I have been played.
Read 4 tweets
Brian Roemmele Profile picture
Aug 27, 2024
With just a microcurrent channel of 10 Hz and a second microcurrent channel at 40 Hz, just about all pain can be eliminated in most people in 15 minutes.

It has been known for decades and I have seen it work 100s of times with folks that had no investment mentality in outcome. Image
The pathway explained simply:

-40Hz -Gamma rhythm:
This particular treatment is proven to increase dopamine and serotonin. It can also improve how the mitochondria in your cells function, making an individual more energetic and enhancing mood. This is because the mitochondria of the cells produce energy.

'Data demonstrated that 40Hz light flicker significantly increased the overall brain oscillation power, particularly in the occipital areas on both sides of the brain' Y.Zhang et Al.

-10Hz -Alpha rhythm:
This frequency is similar to the alpha neural brain waves. Alpha waves are linked to the alpha state of the brain, which promotes learning, mental coordination, and mindfulness. It can induce feelings of calm, increase creativity, and enhance your ability to absorb information.

'Creativity has a brain wave signature as well: alpha waves pulsing out of the brain's right hemisphere' Steven Kotler.
As one often finds with the lost Reddit and Snooope basement dwellers that slither out via Communist Notes they are silly wrong about their guesses and even wrong about the reality of what they guess. And folks ask me why they don’t hear about this stuff. Find these fools and ask them why.
Read 4 tweets

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