The inner life of the hand
About this episode
The episode explores the significance of the human hand from both a physical and cognitive perspective with Dr. Matt Longo.
Newton saw in the human hand proof of the divine; Darwin saw a key to our species' success. Many others, too, have described the hand in hyperbolic terms, as a paragon of design, a cornerstone of human uniqueness, an engine of our achievements. But what makes the human hand so powerful? Is it the proportions of the fingers? Is it the opposability of the thumb? Or, could it be none of this? Could it be that the real power of our hands lies—not in the physical design—but elsewhere, out of sight? My guest today is Dr. Matt Longo . Matt is Professor of Cognitive Neuroscience at Birkbeck, University of London. He's the author of the recent book, The Invisible Hand , a wide-ranging tour of the human hand and how it's geared into the brain. Here, Matt and I talk about the difference between the "visible hand"—that is, its physical structure—and the "invisible hand"—its representation in the brain. We consider the evolution of the visible hand and whether there really is anything truly distinctive or impressive about it. We talk about the biology of touch. We tour the invisible hand, discussing how—through cortical magnification—the hand becomes over-represented in the brain's sensory…
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