Buzz
The human brain, with its immense complexity and capabilities, has been the driving force behind some of humanity's greatest achievements in technology, science, society, and the arts, leaving no doubt about its remarkable potential.
Thanks to our brain, we've turned natural elements like rocks and trees into homes, created lenses to see distant stars or tiny microbes, constructed entire cities and nations, produced timeless works of art, and continue to explore the past while envisioning countless possibilities for the future. All of this is linked through the brain, which connects us all, regardless of time or place.
The brain is truly an extraordinary organ, and there's still so much we have yet to discover. The following 10 facts about the human brain may serve as a reminder of just how awe-inspiring this essential organ is.
10. The Brain Generates Heat
Studies show that, just like machines, the human brain heats up during activity, with its temperature rising to 104°F (40°C), in contrast to the body's typical 96.8°F (37°C). While this temperature indicates the brain is functioning well, abnormal heat patterns might signal potential brain damage or disorders.
4-D temperature maps of the brain throughout the day reveal that female brains tend to be slightly warmer than male brains, possibly due to the menstrual cycle. The research found that daily temperature fluctuations in both genders were usually within 1.8°F (1°C), with the outer regions of the brain being cooler. Brains are cooler at night and warmer during the day, and the brains of older individuals tend to run hotter compared to younger ones. This study could offer insights into diagnosing and treating brain disorders or damage.
9. Fine Particles Could Harm the Brain
An online study explains that inhaled ultra-fine toxic air particles can travel from the lungs into the bloodstream, eventually reaching the brain where they embed themselves in its tissue, often staying there longer than in any other organ.
The entry point seems to be the blood-brain barrier, which, according to Harvard Medical School, is a protective layer separating the brain from the circulatory system, typically allowing only small, vital molecules like oxygen and glucose to pass through.
The researchers were deeply concerned by the presence of invasive particles such as calcium, iron, malayaite, and anatase titanium dioxide, as they can trigger neuroinflammation and lead to significant cognitive decline.
8. Some Brains Struggle to Recognize Faces
Prosopagnosia, commonly known as face blindness, is a neurological condition where individuals are unable to recognize familiar faces. While those affected can perceive faces, they fail to identify who they belong to, even if the face is that of a family member or themselves.
Brad Pitt, a celebrity who lives with prosopagnosia, helps shed light on this condition. He has shared that people often doubt his inability to recognize their faces, leading them to perceive him as 'disrespectful, egotistical, and conceited.' This misunderstanding has made him feel isolated since his youth.
Prosopagnosia typically begins at birth. Despite his feelings of loneliness, Pitt is not alone, as one in 50 people are affected by this condition, which may stem from 'abnormalities in a part of the brain called the fusiform gyrus,' according to the National Health Service.
7. The Brain May Be Capable of ‘Rewiring’ Itself
Can the brain really be rewired? The answer seems to be a tentative yes. Psilocybin mushrooms could offer a treatment for major depressive disorders that often do not respond to conventional therapies. The U.S. Food and Drug Administration has even labeled psilocybin as a potential breakthrough treatment.
Once ingested, psilocybin is converted in the intestines into psilocin, a chemical known for its psychoactive effects. Psilocybin has the potential to treat various conditions, including cluster headaches, anxiety, anorexia, OCD, substance abuse, and PTSD, albeit for a limited time.
Psilocybin may help break the cycle of self-critical and negative, anxious, or fearful thoughts in those suffering from depression. This, researchers argue, fosters more flexible thinking and allows the brain's neurons to grow new dendrites, enhancing communication between brain cells and forming new neural pathways. However, Matthew Johnson, a professor specializing in psychedelics and consciousness at Johns Hopkins Medicine, warns that 'a psychedelic doesn’t work for everyone.'
6. Modern Life Shapes the Brain
The pressures of modern life can negatively affect the brain's prefrontal cortex, leading to a condition called 'frontal fatigue.' This state leaves individuals more susceptible to mental health disorders. One doctor offers a three-step approach to alleviate stress and restore balance.
The first step is to recognize the signs of frontal fatigue: difficulty focusing, forgetfulness, trouble multitasking, and heightened irritability or emotional outbursts.
Dr. Rego recommends engaging in hands-on activities like crafting, cooking, creating art, playing an instrument, gardening, or undertaking DIY projects. He also advises stimulating the senses by exploring new foods, art, music, and especially nature. Social interaction is important too: 'Talk with, question, greet, or chat with others—and not just those close to you, but people you see, work with, pass by, and wait in line with.'
The third strategy for addressing frontal fatigue is managing thoughts and emotions more effectively. This can be achieved through meditation, reading challenging books, and working on reducing irritability. Dr. Rego also suggests disconnecting from technology and social media as much as possible.
5. The Brain Compresses Information
To perform at its best, the human brain filters out irrelevant information, concentrating only on what is necessary for the task at hand. Neuroscientists explain that the brain adopts a form of tunnel vision, maximizing performance while minimizing energy consumption through data compression.
Research by Christian Machens, Joe Paton, and other scientists provides valuable insights into how mental representations of the world might influence intelligent behavior, particularly in the realms of life sciences, artificial intelligence, and decision-making.
4. Einstein’s Brain Displayed Unusual Characteristics
Postmortem photographs and tissue samples of Albert Einstein’s brain, alongside autopsy findings, revealed both typical and several unique features.
Einstein’s brain showed the usual signs of aging, but two areas of his brain contained an extraordinary number of glial cells, which support neurons. Additionally, his parietal lobe lacked a furrow and a structure known as the operculum. The absence of this furrow is believed to have 'enhanced the connections in this region,' which plays a crucial role in visuospatial abilities and mathematical reasoning.
Another remarkable aspect of Einstein’s brain is the 'complexity and pattern of convolutions on certain parts of his cerebral cortex,' which expanded the surface area of that region and may have played a key role in his extraordinary abilities, supporting his thought experiments on the nature of space and time.
An interesting and perhaps surprising fact about the renowned theoretical physicist is that Einstein's brain was actually smaller than the average brain size.
3. The Brain’s Response to Horror Movies
Not surprisingly, neuroimaging studies show that the brain reacts strongly to horror movies, particularly those that build tension toward a shocking or horrific moment, as opposed to relying on jump scares. Rather than a surge of dopamine, these films activate areas of the brain involved in visual and auditory processing as anxiety builds. Following such moments, regions related to emotional processing, threat evaluation, and decision-making experience heightened activity.
In every movie, characters face conflict as they encounter threats to their safety, or even their very survival. However, horror films set themselves apart from other genres by introducing a 'superhuman or supernatural threat that cannot be easily reasoned with or fought.' Audiences of horror films, researchers discovered, are drawn to the thrill and often prefer watching these films in groups to share the excitement, rather than viewing them alone.
Psychological horror based on real events is particularly terrifying to audiences, with people reacting more strongly to implied or unseen dangers rather than visible, concrete threats. In other words, the creeping sense of dread—when something feels wrong but cannot be pinpointed—is often more unsettling than the abrupt appearance of a monster that makes us jump.
In one experiment, participants watched horror films while inside a magnetic resonance imaging scanner that tracked their brain activity. The results revealed that as anxiety gradually grew, their brains became increasingly engaged, actively seeking out environmental cues.
Conversely, when sudden shocks were introduced, specific areas of the brain associated with emotion processing, threat assessment, and decision-making were activated, prompting quick responses. However, the later areas of the brain maintained constant communication with the earlier ones, ensuring that responses to perceived threats were well-coordinated.
9. The Brain Thrives on Surprises
MRI scans of the human brain show that humans are naturally wired to enjoy unexpected occurrences. Surprises, especially, trigger strong reactions in the nucleus accumbens, known as 'the brain’s pleasure center.'
As an assistant professor of psychiatry at Emory University in Atlanta explained, while receiving birthday gifts is enjoyable, presents given on any other day are even better because they’re unexpected. Positive surprises trigger a burst of dopamine, lighting up the nucleus accumbens as brightly as a Christmas tree, as noted by an associate professor of neuroscience at Baylor College of Medicine in Houston.
1. Some Animal Brain Cells Bear a Resemblance (to a Degree) to Ours
The von Economo neuron is unmistakable. Named after the anatomist Constantin von Economo, it is large and distinct in shape—and it appears in the brains of both humans and some animals. Specifically, it can be found in the brains of certain larger animals like great apes, whales, dolphins, cows, and elephants.
Scientists believe this neuron evolved independently in large-brained or particularly social animals. It’s missing in individuals with certain brain disorders, and it’s found in abundance among super-agers—older people who do not experience typical age-related memory decline. Aside from these details, much remains unknown about these neurons, as animals commonly used in lab experiments, such as rats and mice, lack them. Further research is expected to delve deeper into the fascinating giant neuron.
