Researchers at UCLA found that cells in the human anterior cingulate, which normally fire when you poke the patient with a needle ("pain neurons"), will also fire when the patient watches another patient being poked. The mirror neurons, it would seem, dissolve the barrier between self and others. [1] I call them "empathy neurons" or "Dalai Lama neurons." (I wonder how the mirror neurons of a masochist or sadist would respond to another person being poked.) Dissolving the "self vs. other" barrier is the basis of many ethical systems, especially eastern philosophical and mystical traditions. This research implies that mirror neurons can be used to provide rational rather than religious grounds for ethics (although we must be careful not to commit the is/ought fallacy).
V.S. RAMACHANDRAN is director of the Center for Brain and Cognition and professor with the Psychology Department and the Neurosciences Program at the University of California, San Diego, and adjunct professor of biology at the Salk Institute. He is the coauthor (with Sandra Blakeslee) of Phantoms in the Brain: Probing the Mysteries of the Human Mind. V.S. Ramachandran's Edge Bio Page
Introduction
Six years ago, Edge published a now-famous essay by neuroscientist V.S. Ramachandran (known to friends and colleagues as "Rama"), entitled "Mirror Neurons and Imitation Learning as the Driving Force Behind "the Great Leap Forward" in Human Evolution" [2]. This was the first time that many in the Edge community heard of mirror neurons, which were discovered by Iaccomo Rizzolati of the University of Parma in 1995. In his essay, Rama made the startling prediction that mirror neurons would do for psychology what DNA did for biology by providing a unifying framework and help explain a host of mental abilities that have hitherto remained mysterious and inaccessible to experiments. He further suggested "that the emergence of a sophisticated mirror neuron system set the stage for the emergence, in early hominids, of a number of uniquely human abilities such as proto-language (facilitated by mapping phonemes onto lip and tongue movements), empathy, "theory of other minds," and the ability to "adopt another's point of view."
In the past few years, mirror neurons have come into their own as the next big thing in neuroscience, and while the jury is still out on Rama's prediction, it's obvious that something important is unfolding:
• Interesting new research is being conducted in neuroscience labs in the US and Europe and is being discussed at conferences and in the press.
• A team at UCLA led by Marco Iacoboni, director of the Transcranial Magnetic Stimulation Laboratory of the Ahmanson-Lovelace Brain Mapping Center at UCLA recently published important results ("Grasping the Intentions of Others with One's Own Mirror Neuron System," Iacoboni et al, 2005);
• Christian Keysers, associate professor at the Neuro-Imaging-Center of the University Medical Center Groningen (Netherlands) published a paper neural basis of social intelligence with mirror neuron pioneers Rizzolatti and Gallese ("A unifying view of the basis of social cognition" Gallese, Keysers, Rizzolatti, 2004);
• The New York Times "Science Times" published a page one review article on mirror neurons by ("Cells That Read Minds" by Sandra Blakeslee, January 10, 2006);
• A virtual workshop—"What do Mirror Neurons Mean"—moderated by Gloria Origgi and Dan Sperber, and sponsored by the European Science Foundation, has an ongoing discussion on the theoretical implications of the discovery of mirror neurons.
• At a recent conference near Paris—"Contribution of Mirroring Processes to Human Mindreading"—on the implications of mirror neurons for science and philosophy, top neuroscientists, psychologists, philosophers, and anthropologists from Europe and the United States engaged in heated debates on the interpretation and consequences of the discovery, but at least one thing was clear: mirror neurons matter, and we are only beginning to understand how much and how.
Two weeks ago, Edge received Rama's essay in response to the 2006 Edge Question, "What is your dangerous idea," which we are publishing as a separate feature. Rama's "dangerous if true" idea is "what Francis Crick referred to as 'the astonishing hypothesis'; the notion that 'our conscious experience and sense of self is based entirely on the activity of a hundred billion bits of jelly—the neurons that constitute the brain. We take this for granted in these enlightened times but even so it never ceases to amaze me." He then goes on to characterize Crick's "astonishing hypothesis" as a key indicator of "the fifth revolution"—the "neuroscience revolution"—the first four being Copernican, Darwinian, Freudian, and the discovery of DNA and the genetic code," and "that even our loftiest thoughts and aspirations are mere byproducts of neural activity. We are nothing but a pack of neurons." Central to this revolution are mirror neurons.
Rama also asks an interesting question:
Let's advance to a point of time where we know everything there is to know about the intricate circuitry and functioning of the human brain. With this knowledge, it would be possible for a neuroscientist to isolate your brain in a vat of nutrients and keep it alive and healthy indefinitely.
Utilizing thousands of electrodes and appropriate patterns of electrical stimulation, the scientist makes your brain think and feel that it's experiencing actual life events. The simulation is perfect and includes a sense of time and planning for the future. The brain doesn't know that its experiences, its entire life, are not real.
Further assume that the scientist can make your brain "think" and experience being a combination of Einstein, Mark Spitz, Bill Gates, Hugh Heffner, and Gandhi, while at the same time preserving your own deeply personal memories and identity (there's nothing in contemporary brain science that forbids such a scenario). The mad neuroscientist then gives you a choice. You can either be this incredible, deliriously happy being floating forever in the vat or be your real self, more or less like you are now (for the sake of argument we will further assume that you are basically a happy and contented person, not a starving peasant). Which of the two would you pick?
—JB