Anatomy of happiness

THE SCIENCE OF HAPPINESS: HOW OUR BRAINS MAKE US HAPPY—AND WHAT WE CAN DO TO GET HAPPIER Stefan Klein Speaking Tiger | 296 pages | Rs 450

In our fast-paced lives, we are constantly looking for things and situations that will make us feel happy. While chasing the mirage of a stress-free life, people often try out different solutions—meditation, yoga, physical exercise, chanting, herbal concoctions, self-help camps, motivational talks and so on. All this has given rise to a happiness or “feel good” industry in recent years. But we seldom peep into ourselves, our body and the brain—which is the seat of all feelings and emotions, including happiness. In recent years, scientists have done phenomenal research in understanding the biological basis of human feelings like happiness, anger and sadness. Advances in molecular biology are providing scientists new ways of exploring different mechanisms and circuits in the human brain and how they control our behaviour. It is now possible to “see” changes occurring in the brain circuitry as people experience emotions. We read about the results of new studies on various aspects of the human brain, but often miss out on the bigger picture.

German physicist and science writer, Stefan Klein, has tried to fill this gap. And the bigger picture that emerges is quite fascinating. Two recent and significant discoveries explain the human urge for happiness. The first reveals that the human brain has a kind of a special circuitry for joy, pleasure and euphoria, and the other shows that our brain continues to change even after we grow up. This means the brain can reprogram itself using external experiences as well as learning on its own. Citing innumerable research findings, ongoing experiments, interviews with scientists as well as real examples from everyday life, Klein has pieced together an absorbing account of the human brain. While doing so, he has quoted numerous philosophers, gurus, writers and poets (including Tagore) and demolished some popular myths about the human brain. Without sounding preachy or technical, the author has conveyed the complex scientific ideas and concepts in an easytograsp narrative.

Emotional circuits

Many of the new discoveries about the brain seem to confirm the age-old wisdom of the Greeks and the Romans, as well as eastern cultures. Happiness and unhappiness have their own brain circuits and chemistry. But this does not mean that they are independent of one another. The brain system for positive and negative feelings is entwined in such a way that a good feeling can prevent a bad one and vice versa. The author explains the interplay between negative and positive emotions this way: “Every neuron is in contact with other nerve cells, some of which provide signals that stimulate activity in the neuron. From others come inhibiting impulses, and the result is a contest of strength between the stimuli. Like a small computer, the neuron draws its conclusion from the contradictory signals and communicates it, in turn, to other cells.”

The author details the role and mechanisms that brain chemicals or neurotransmitters like dopamine, opioids, oxytocin, betaendorphin and luliberin play in the manifestation of different forms of happiness such as love, desire, sexual attraction, passion and friendship. While dealing with the “dark side of desire” such as drug addiction, the author explains: “Like many things that have multiple applications, the brain circuits for pleasure are vulnerable to misuse.” This is significant because the human brain has a single, all-purpose system for desire and its gratification—and not separate circuits for controlling our desire to eat, another for love and a third one for social recognition. That’s why, he says, “Deadly sins can be seen as an overshooting of our natural desire for happiness.” The experience of addiction permanently transforms the functioning of certain nerve cells in the brain, altering the way in which genetic information is read and changed into proteins.

The brain has a survival mechanism that helps us to deal with dangers or negative thoughts. More importantly, it has the ability not just to recognise threats, but also to imagine them. This system can sometimes result in problems like depression, which is nothing but chronic sadness. Depression, Klein says, is: “The price we pay for our imagination and intelligence.” More than pills, it seems small activities can bring a feeling of success that can help overcome sadness. Physical activity too helps a great deal—it stimulates neuron growth and works against depression and overall health of the brain.

The book drives home the point that there is no formula to achieve happiness, yet it gives some general tips about the wellbeing of the brain. At the beginning of the book, the author promises that “after you have read this book, your brain will look different than it did when you started”. Not sure about the changes that have occurred in the reviewer’s brain, but the book is certainly a treatise for anyone even slightly curious about this vital function of human body.

The author is a science journalist

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