Keeping its secrets

Incognito: the secret lives of the brain

David M. Eagleman
Nonfiction 290 pages
Pantheon. 2011

You may think you know who you are, but according to David Eagleman it’s a case of mistaken identity. We consider the contents of our awareness as belonging to ourselves. Yet, that awareness, what we call consciousness, is only a small part of what goes on in our brains. Consciousness is like an iceberg’s tip – visible above the water’s surface. Much of what runs us is below the surface and well beneath our awareness.

Most of us realize this to some extent. After all, our hearts pump and our lungs breathe without our awareness most of the time. But most of us don’t realize the extent to which non-conscious mental activity controls our behavior.

Eagleman tells us that the brain is composed of interacting systems, running a myriad of mental routines, and very little of this activity makes it into our awareness. It’s as if our brains are run by a team of rivals with different viewpoints to match different circumstances. When teammates interact appropriately, we make good decisions most of the time.

It’s natural for us to prefer people like ourselves over those who look different. But, the dark side of this preference may be behind xenophobia and racism. Psychologists have used word association tests to tease subjects’ inner-racists into showing themselves. Most people keep their inner-racists well under control, but brain dysfunction or alcohol use can disturb the balance between the rivals in our brains. After visiting a Jewish friend, actor Mel Gibson, was arrested for driving under the influence of alcohol. Later, a sober Gibson apologized for the anti-Semitic remarks he made while intoxicated. The question arises, which is the real Mel Gibson, the sober or the drunken one?

Eagleman’s answer is that both are real, because Gibson’s brain, like everyone’s, is composed of interacting rivals. Most of us behave in socially appropriate ways most of the time. But, there are exceptions. One of the symptoms of Tourette’s syndrome is coprolalia, that is, inappropriate vocal outbursts. While a normal person might experience an inappropriate thought, a Tourette’s sufferer might involuntarily vocalize it, much to his embarrassment.

People suffering from frontotemporal dementia act out socially inappropriate impulses that they formerly kept well controlled. For example, they may shoplift, make unwelcome sexual passes, act aggressively, and even publicly remove clothing. They lose the ability to know that this behavior is inappropriate.

Eagleman argues that legal systems need to be reformed to take into account criminals’ capacity to change their behavior. While society should be protected from criminal behavior, punishments having no effect on those unable to change, should be replaced with other interventions. Eagleman discusses the case of a man who committed murder while sleep walking. Although, this seems unlikely, electroencephalogram findings demonstrated an abnormality that caused the man’s brain to attempt rapid transition from sleep to wakefulness without passing through the intermediate stages that most people pass through. This occurred 10 to 20 times per night. The man was acquitted.

As neuroscience discovers more precise ways of uncovering brain abnormalities, the legal system will need to accommodate these new findings. Asking if a criminal is blameworthy will ultimately become an irrelevant question, Eagleman believes. Instead we should be asking how to prevent him from committing future crimes. An experimental technique, called the prefrontal workout, shows promise for eliminating undesired behaviors. The technique uses real-time biofeedback to reduce the strength of unwelcome urges.

In 1848, a premature explosion sent a tamping rod through Phineas Gage’s head. He survived, but his personality did not. After his accident, he was no longer capable of socially appropriate behavior and judgment. Those who knew him described him as, “no longer Gage.”

Who was he then? Did he lose his soul along with some of his brain? Do we even have souls to begin with or are we simply collections of parts? Eagleman tells us, “If there’s something like a soul, it is at minimum tangled irreversibly with the microscopic details. Whatever else may be going on with our mysterious existence, our connection to our biology is beyond doubt.”

Eagleman’s first book was “Sum: forty tales from the afterlives.” One might expect a man who constructed 40 possible afterlives to have more to say about the soul. Alas, he only writes a few words on the topic in “Incognito: the secret lives of the brain.” So let me offer up a theological question or two. If part of the brain is injured, does part of the soul vanish? If a good man turns evil after a brain injury, will he be eternally punished or spared through God’s mercy? Just which pieces of the brain house the soul, anyway?

Eagleman discusses a type of epileptic seizure in a “sweet spot” in the temporal lobe that causes religious conviction, writing on religious topics, voices from apparently divine sources, and a sense of divine presence. Is the sweet spot a gift from God that allows Him to communicate with his prophets or merely the reason the prophets invented Him?

Eagleman concludes his book with a discussion of the weaknesses of reductionism as a means of understanding the brain. It isn’t practical to break the brain down into a collection of parts. Regardless, he tells us, it’s the model that most neuroscientists bring with them into the lab. I wonder how a sense of personal identity can arise from a collection of parts.

Allied Alchemists

137: Jung, Pauli, and the Pursuit of a Scientific Obsession

Arthur I. Miller
Nonfiction 363 pages

Despite the title, you’ll have to read the final chapter before you learn much about the number 137. But that doesn’t hurt this double biography. Along the way you’ll learn about the numbers three and four and what they meant to Johannes Kepler and Robert Fludd, one a pioneer of science, the other a mystic.

While three is the number of the trinity, four is that of the cardinal directions. C. G. Jung and Wolfgang Pauli both examined the symbolism of these numbers.

Their relationship began when Pauli approached Jung for therapy. Although, Jung referred him to one of his pupils, Jung took an active interest in Pauli’s analysis. As their friendship developed, Pauli found an outlet for his mystical, intuitive side. Jung hoped that Pauli could lend a more scientific foundation to Jung's brand of psychology.

Jung believed that the human psyche was populated by archetypes which supplied symbolic meaning. Certain numbers, among them three and four, could take on archetypal qualities in dreams and visions. Just as these numbers appeared in myth and alchemical texts, they also appeared in Pauli’s dreams and in his efforts to discover the structure of the atom.

Early in his career, Pauli worked with Niels Bohr whose theory of the atom hinged on three quantum numbers. But the theory wasn’t complete until Ralph Kronig proposed that electrons had a spin of one half and others provided evidence. Spin became the fourth quantum number, but its addition meant that electrons could no longer be visualized.

Pauli and Jung both believed in the paranormal, unlike Jung’s mentor Sigmund Freud. Once while arguing with Freud about parapsychology, Jung experienced a feeling like his diaphragm was turning into hot iron. Just then, a loud noise came from Freud’s bookcase and both men jumped. Jung remarked that the event was an example of “a physical effect brought about by a mental thought.” Freud was merely dismissive.

Pauli was a believer in what his colleagues named the Pauli Effect. The frequent failure of equipment in the presence of Pauli made the theoretician unwelcome in physics laboratories due to his Pauli effect. People suffered from the Effect as well. On one occasion the chairs to Pauli's right and left of Pauli simultaneously collapsed, dislodging the women seated upon them.

Jung coined the term “synchronicity” to account for a type of paranormal phenomena. Synchronicity is what Jung calls meaningful coincidences that have no apparent cause. For example, on one occasion a woman was discussing her dream of a scarab when one tapped on Jung’s office window. The coincidental appearance of a real scarab profoundly affected Jung’s patient and allowed her to benefit from her therapy. Telepathic and precognitive dreams are other examples of synchronicity.

The causal universe of Newtonian physics was displaced early in the twentieth century by the arrival of quantum physics. Events at the quantum level could no longer be said to be causal – they are probabilistic. Both Pauli and Jung were well aware of this and Pauli had no difficulty accepting the possibility of synchronicity.

The friendship between the two resulted in the 1952 publication of “The Interpretation of Nature and the Psyche,” a volume containing two essays — Jung’s "Synchronicity: an acausal connecting principal" and Pauli’s “The Influence of Archetypal Ideas on the Scientific Theories of Kepler.”

Returning to 137 — the number occurs several places in the book. Bohr’s theory was tested by examining the spectral lines created by the light emitted when an electron drops from a higher to a lower orbit. Some of these were found to consist of closely spaced individual lines known as the “fine structure.” The distance between the lines of the fine structure of a spectral line, Bohr called “the fine structure constant.” Pauli was able to determine that this constant is a pure number equal to 1/137 or 0.00729. He wondered why 137 and not some other number — a question that was to occupy much of his professional life.

In addition to being a prime number, there are several other interesting facts about this number. The values of the Hebrew letters which spell the word Kabbalah total 137. So do the Biblical phrases, “The God of Truth” and “The Surrounding Brightness,” and the Hebrew word for “crucifix.”

But perhaps the oddest coincidence was that the hospital room in which Pauli died was number 137. When Charles Enz visited Pauli, he informed Enz that the room was number 137, “I’m never getting out of here alive.”

Miller’s book is an interesting mixture of biography and science and very hard to put down. For those who understand the math, Miller supplies a bit to ponder. But for the most part, the book can easily be enjoyed by non-scientists.

Seven and a Half Lessons About the Brain
Lisa Feldman Barrett
Nonfiction, 180 pages, 2020

This is a book of essays. It could have been a textbook, but in that case, it would have been far lengthier. The essays make up two thirds of its length. Detailed footnotes fill the final third. Although brief, this book will change the worldview of many readers. This summary can’t do it justice.

The author begins with the half lesson:

• Your Brain Is Not for Thinking

It was designed to aid in predicting and regulating bodily processes and ensuring survival.

• You Have One Brain (not Three)

As I learned somewhere, we have a dinosaur brain, a cat brain, and a rational neocortical brain all piled on top of one another. This theory is bunk. Lisa Feldman Barrett shows us why.

• Your Brain Is a Network

Have you heard that we’d be geniuses if we used our whole brains instead of a mere ten percent? That is also bunk. The parts of the brain’s network are always connected, and functioning a part of a whole. Neurons that don’t connect are pruned from the network.

Older, less accurate brain models point to locations where special functions occur. But the brain behaves holistically as well as locally.

“Your network is also dynamic in another way. As neurons change conversation partners, a single neuron can take on different roles. For example, your ability to see is so intimately tied to an area of the brain called the occipital cortex that the area is routinely called the visual cortex; however its neurons routinely carry information about hearing and touch.”

Neurons multitask and some are multitasking pros, “Some neurons in your brain are so xibly connected that their job is to have many jobs.”

Little Brains Wire Themselves to Their World

Many animals are able to walk shortly after birth. It takes baby humans about a year to start walking. Human brains aren’t fully wired until about age 25. Perhaps because our brains wire slowly we have unique intellectual advantages. Barrett describes in detail the ways baby’s wire themselves to their environments.

• Your Brain Predicts (almost) Everything You Do

"Neuroscientists like to say that your day- to-day experience is a carefully controlled hallucination, constrained by the world and your body but ultimately constructed by your brain. It's not the kind of hallucination that sends you to the hospital. It's an everyday kind of hallucination that creates all your experiences and guides all your actions."

She continues,

"I realize that this description defies common sense, but wait: there's more. This whole constructive process happens predictively. Scientists are now fairly certain that your brain actually begins to sense moment-to-moment changes in the world around you before those light waves, chemicals, and other sense data hit your brain. The same is true for your body—your brain begins to sense them before the relevant data arrives from your organs, hormones, and various bodily systems. You don't experience your senses this way but it's how your brain navigates the world and controls your body."

Following further explanation, Barrett concludes:

"If your brain has predicted well, then your neurons are already firing in a pattern that matches the incoming sense data. That means the sense data itself has no further use beyond confirming your brain's predictions. What you see, hear, smell, and taste in the world and feel in your body in that moment are completely constructed in your head."

When a police officer mistakes a cell phone for a gun and fires, his brain has likely responded to its prediction and not to its incoming sense data. Sadly such mistakes get innocents killed. The triune brain theory originated with the ancient Greeks, as did our notions of human rationality. While rationality is a prized quality, people don't always behave rationally, especially in tense situations. Our culture and legal system are still influenced by ancient Greeks and Roman notions about rationality. We need to update our old ideas to reflect our new knowledge about the brain. Perhaps we can rethink and restructure our policing methods to prevent unnecessary deaths.

Three more chapters tell us what else is unique about the human brain.

• Your Brain Secretly Works With Other Brains - It’s "A brain that regulates other brains so invisibly that we presume we’re independent of each other""
• Brains Make More Than One Kind of Mind - Your brain is "A brain that creates so many kinds of minds that we assume there’s a single human nature to explain them all"
• Our Brains Can Create Reality - Your brain is "A brain that’s so good at believing its own inventions that we mistake reality for the natural world."

The reality our brains create is largely a social one.

"The human brain misunderstands itself and mistakes social reality for physical reality, which can cause all sorts of problems. For example, humans vary tremendously, like every animal species does. But unlike the rest of the animal kingdom, we organize some of this variation into little boxes with labels such as race, gender, and nationality. We treat the labeled boxes as if they're part of nature when in fact we built them."

It's useful to know how our brains work instead of just trusting how we think they do. Once you know how your brain works, you can tap its strengths and dodge its illusions. But you cannot look at your world in the same way ever again.