Buzz
For centuries, scientists have struggled to decode the mysterious workings of the mind. While advancements in technology and our understanding of the brain have clarified some aspects, they have also exposed even more peculiarities in how memory functions.
From survival instincts that disrupt our understanding of numbers to false memories and counter-intuitive recollections, researchers are constantly outpaced by the strange behavior of the mind. They’ve managed to teach patients while they sleep, transplant memories, and even explore prosthetic memory.
10. The False First Memory
A person’s earliest memory represents the first sense of self-awareness. It’s unsettling to learn, however, that most people’s earliest memories are fabricated. In an experiment where volunteers shared their earliest recollections, the majority of them couldn’t accept that these memories had been created, rather than experienced.
Yet, the 2018 study is grounded in science. Around 40 percent of the 6,600 participants claimed to recall memories from as early as 9 to 12 months old, which falls into the preverbal stage of human development. This is typically a time when babies can’t retain memories, and scientific literature suggests memories only form clearly after the age of two.
Why do people firmly believe their earliest memory is not imaginary?
The explanation is multi-faceted, ranging from a sense of nostalgia to a deep-rooted investment in personal identity shaped by the stories we tell ourselves. Studies suggest that the so-called 'first memory' could be many things. It could be fabricated, pieces of a memory from a later event, or even something shaped by family photos and anecdotes.
9. The Memory Bank of the Internet
In 2016, researchers explored a rat's brain to understand the memory capacity of the human brain. The two species share similarities in brain structure and synapse activity. The scientists spent a year meticulously mapping every cell they discovered in a slice of the rat's hippocampus. Remarkably, they extracted a large volume from a tissue sample that was small enough to fit 20 times across the width of a human hair.
From this data, they calculated the number of neurons with full structures. They then examined 287 brain cells, analyzing their size and the communication network between their synapses. Upon discovering that these neurons connected to almost identical sites for signal transmission, it became clear that a single neuron could employ up to 26 distinct methods to encode information.
The precision of the findings enabled the team to translate the data into computer language. Astonishingly, the human brain can store one petabyte of information, which is equivalent to the entire data on the Internet. Remarkably, this mental data storage operates on the power of a 20-watt lightbulb. In contrast, a computer requiring the same memory capacity would need a nuclear power station to function.
8. Hypnopedia Is Real
Thanks to hypnopedia, the concept of learning while asleep, some products have carved out a unique niche. While the idea of mastering martial arts or acquiring a new language just by listening to recordings during sleep seems enticing, hypnopedia has its limitations. As far back as the 1950s, it was established that humans cannot absorb information unless they are awake. Modern studies have confirmed these conclusions but have also revealed some intriguing new findings.
In 2014, Israeli researchers managed to partially cure nicotine addicts by exposing sleeping participants to a mixture of cigarette smoke and unpleasant odors. Remarkably, none of the participants smoked for two weeks afterward.
A 2017 study later showed that the sleeping brain can indeed form new memories. While learning Spanish in your sleep may be a stretch, the brain can automatically recognize complex patterns embedded in white noise during rest.
When the participants woke up, they were able to identify patterns, but only if the sounds had been played during their REM sleep cycles. The group did not succeed when the audio was played during non-REM, a deeper phase of sleep. This was the first evidence suggesting that different sleep stages are crucial to memory formation.
7. The Epigenetic Enigma
A field known as epigenetics suggests that children inherit the life experiences of their fathers. Everything Dad consumed or was exposed to in his environment could influence the biology of multiple generations. Several animal and human studies have supported the existence of paternal 'life memories.'
In 2018, researchers from Santa Cruz uncovered a part of the mystery. Their subject of study was a male roundworm, specifically its sperm. What they found was surprising—histone packaging, a protein that holds DNA in chromosomes, which is where the epigenetic information was located.
Discovering epigenetic markers in sperm is a breakthrough, but it’s not enough to fully explain this strange form of inheritance. Scientists now know these markers are transferred through histone packaging. These proteins were found in crucial chromosomes for development, to the point that when baby worms lacked the normal epigenetic markers, they were born sterile.
6. The Ultimate Memory Hack
Need to recall something? Draw it.
A recent study revealed that doodling might just be the new Jedi mind trick. Canadian researchers, particularly those focused on Alzheimer's, took it seriously. They brought together 48 volunteers to further investigate how drawing can enhance recall in young adults. This time, they included older individuals as well—half were in their early twenties, the rest were around 80 years old.
Participants were given a list of words and were given a choice: they could write each word down, list its attributes, or draw an image that represented the word. After a short break, the volunteers had to recall as many words as they could. The younger group performed better overall, though both age groups showed a surprisingly similar result.
Those who chose to doodle remembered the most words. Drawing seemed to outperform traditional memory techniques like writing or reviewing text. Researchers theorize that the effectiveness of this method lies in the brain's ability to absorb the same information through multiple channels—visual, verbal, spatial, meaning, and the physical act of drawing.
5. Math Can Be Traumatic for the Brain
Math trauma is real. Most people are familiar with the experience: you stare at an equation, only to have your brain freeze up. Those who struggle with numbers are often labeled as incapable. If you can't perform calculations quickly and accurately, you're at risk of being labeled a 'math idiot.'
The reality is much more encouraging—most people are actually quite capable of mathematics. Even those who experience anxiety during exams (and still fail).
The issue? Fear.
Timed tests, demanding teachers, and classmates who breeze through fractions are not helpful for those who fear falling behind or making mistakes. Fear is an ancient instinct. It disrupts memory because when you're focused on avoiding danger, like an approaching cave lion, your body just wants you to flee up the nearest tree.
Fear doesn't distinguish between long-forgotten predators and math problems. When someone panics over algebra, the fear suppresses memory, making calculations nearly impossible.
4. Anti-Memories
An ongoing enigma surrounds how memories are stored. If all the information we ever encountered remained perfectly clear, we wouldn’t be able to remember new things, like where we parked our car.
In 2016, a study uncovered evidence of anti-memories. This process enables the brain to keep accumulating new memories without any issues. It all hinges on a balance between two types of brain cells—those that are highly excitable and those that have a calming effect.
When a memory is formed, the excitatory cells transmit electrical signals to one another. These cells can’t remain in this heightened state. Researchers suggest that excessively active neurons could contribute to conditions like epilepsy, schizophrenia, and autism.
To restore equilibrium, the calming neurons generate what scientists refer to as anti-memories. These neurons also create connections, but with the exact opposite pattern of the initial memory.
Tests revealed the existence of this balancing mechanism in volunteers when ‘forgotten’ memories resurfaced after suppressing the calming neurons. These memories were never truly erased; they were simply silenced to prevent interference with new ones.
3. Alzheimer’s Breakthrough
Currently, there is no cure for Alzheimer’s disease, a condition that is devastating the lives of 50 million people worldwide. However, in 2015, Australian researchers discovered a potential way to eliminate the root cause.
Alzheimer’s develops when plaques accumulate and interfere with brain functions, leading to irreversible cognitive decline. Back in Australia, a group of mice experienced similar symptoms. They were treated with a groundbreaking method that could transform how this disease is tackled.
Approximately 75 percent of the mice fully regained their mental abilities, including memory. The new treatment is noninvasive and doesn’t damage brain tissue. Known as focused therapeutic ultrasound, it uses high-frequency sound waves to gently widen the blood-brain barrier, allowing waste-clearing cells to do their job.
These cells quickly act to remove the lesions that contribute to the most debilitating symptoms of Alzheimer’s. This discovery could pave the way for an effective, drug-free treatment for patients.
2. Memory-Swapping Snails
In 2018, snails demonstrated the ability to swap memories. This strange occurrence was the result of research conducted by a team of scientists from California. Curious to explore the possibility of genetic memory, the researchers turned to sea snails known as Aplysia californica.
During the experiment, one snail was subjected to an electric shock. Immediately, the snail retracted its fleshy flaps. With repeated shocks, the snails learned to pull in their flaps for longer periods of time.
Researchers extracted RNA (a genetic molecule that serves as a messenger) from the trained snail and transplanted it into another. The second snail then remembered the donor's experience. After the first shock, the recipient snail retracted its flaps for a longer duration, as though anticipating another shock. Snails that received RNA from untrained donors only retracted briefly, believing the shock was a singular event.
This demonstrated that memory could be encoded within the genetic code, although the precise mechanism by which the donor's material communicates this memory to another snail remains unclear.
1. Prosthetic Memory
Inserting electrodes into a healthy human brain is a process laden with strict regulations. However, in 2018, researchers were given the opportunity to work with patients who already had implants. These patients, all of whom were suffering from epilepsy, were treated at Wake Forest Baptist Medical Center. The implanted electrodes were part of their medical treatment, but the patients were open to allowing the scientists to use them for additional research.
The goal was to test an experimental implant designed to replicate a person's brain activity in order to enhance short-term memory. The patients played a computer game that relied on their ability to recall information. Scientists used the electrodes already implanted to record brain activity, particularly during moments when the patients provided correct answers.
The researchers soon compiled personalized activity maps for each participant. When these maps were later used to stimulate their brains, short-term memory recall improved by 35%. This represented a significant breakthrough in developing a “prosthetic memory” device tailored to the individual.
