Benjamin Franklin once quipped: ‘There are three things extremely hard: steel, a diamond, and to know oneself.’ Every decision we make, from pinpointing the source of a faint sound to choosing a new job, comes with a degree of confidence that we have made the right call. If confidence is sufficiently low, we might change our minds and reverse our decision. Now scientists are using these choice reversals to study the first inklings of self-knowledge. Changes of mind, it turns out, reflect a precisely tuned process for monitoring our stream of thoughts.Continue reading
To make a working nervous system, only two forces are necessary: excitation and inhibition. Continue reading
If you grew up with siblings, it is likely that you have heard the phrase, ”Imitation is the sincerest form of flattery.” However, it wasn’t until a groundbreaking finding in the 1990s that the neural correlate to imitation was discovered in a class of neurons called mirror neurons. Continue reading
What are brain waves? It’s no wonder the term sounds like science fiction. In the 1920s, a German psychiatrist embarked on a highly personal quest to discover the supposed medium of telepathy. By placing electrodes on the human scalp, Hans Berger found waves of electrical brain activity using a tool called electroencephalography, or EEG. Physicists had recently shown that electromagnetic waves could propagate through space to carry information. If the brain had its own waves, could they transmit thoughts to others like a radio broadcast?Continue reading
For the first time in over a decade, a new Star Wars film is upon us, and if you’re like the staff of Knowing Neurons, your nucleus accumbens is firing off dopamine as fast as it can! Oh, what’s that you say? Lightsabers, Star Destroyers, and the Force have nothing to do with neurons, action potentials, and brain waves? Ah … I find your lack of faith disturbing.
Pictures are powerful tools for illustrating quantitative data and capturing public interest. Each year, NASA releases many beautiful images of Martian dunes and distant nebulae which help win public funding. Likewise, when it comes to grabbing headlines and commanding public attention, noninvasive studies of functional brain activity often do best when they beautifully illustrate said activity as colorful pixels dancing on the convoluted surface of the cerebral cortex.Continue reading