The Hidden Sense That Reveals How You Feel Inside
Your brain operates in the dark, yet it constantly monitors signals from your body—your racing heart, a nervous stomach, or the air filling your lungs. This inner awareness, known as interoception, processes roughly 11 million bits of sensory data every second, though only a tiny fraction reaches conscious thought. As Moriah Thomason, a neuroscientist at NYU Langone, explains, this filtering is essential for functioning. Without it, we would be overwhelmed by the flood of information our bodies generate.
Coined in 1906 by neurophysiologist Charles Sherrington, interoception remained a niche concept for most of the 20th century. But recent advances, including a 2021 Nobel Prize and new mapping tools, have sparked a surge in research. Scientists are now decoding how signals travel between body and brain, offering fresh insights into conditions like obesity, chronic pain, and anxiety.
In the 1990s, neurologist Antonio Damasio challenged the traditional split between thinking and feeling, arguing that emotions are rooted in bodily signals. His work showed that when this connection breaks, even logical decision-making falters. Meanwhile, neuroscientist Bud Craig mapped how the brain creates a live, inner dashboard of the body—tracking everything from energy levels to hidden threats—much like a starship captain monitors critical systems. This hidden sense, it turns out, shapes how we navigate the world.