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New Insights Into The Minds Eye
Picture what life would be like if you couldn't picture things. Say, somebody puts a lump of clay in front of you and wants you to sculpt what ever you want, but you can't construct an image in your mind of what you want to make, so you can't sculpt. Or maybe you're reading Harry Potter and the Sorcerer's Stone for the very first time, but all of the descriptive scenes are just lost on you. That first portrayal of Hogwarts, the skin of the Troll, or the look of the Quiditch Pitch â€“ you can't picture what the words are describing. Or maybe your significant other calls you and you realize you don't know what they look like.
All of these things are symptoms of a neurological condition that has recently been described for the very first time, it is now undergoing its first major study. It's called Aphantasia â€“ the inability to visualize things in your imagination. It's almost the opposite of Pareidolia, a phenomenon we talked about a couple of weeks ago. Pareidolia is just a trick that the mind plays on most of us when we see things that aren't there, like a face in a pancake, or a tiny woman on Mars. But Aphantasia is, like, the reverse, where a patient lacks the socalled quot;mind's eye.quot; Accounts of the condition go back more than 100 years, but it was only named and identified last month
by Adam Zeman, a neurologist at the University of Exeter, after media coverage of one of his studies revealed that the phenomenon may be more common than anyone thought. Recently, Zeman published a case study about a patient who awoke from heart surgery and found that he no longer had the ability to picture things in his mind. Discover Magazine then profiled Zeman's work, and soon he was contacted by nearly two dozen people who said they had the same symptoms as the heart patient. But most of them didn't know that there was anything different about them until they read about his research. One subject, a 25 year old man from Ontario, was not only unable to picture things in his mind,
he can't conjure up smells, or sounds, or tastes, or any other sensations without experiencing them directly. Another patient, a physician in Wales, has no visual memory and can't remember what any objects or people look like until she sees them again. Now, this is where I normally talk about what causes Aphantasia, but, of course, we don't know because it was just identified a month ago. The process of visualization is very complex because it involves most of the major areas of the brain, so it's hard to pin down where a syndrome like this might start. The act of seeing is processed by the Occipital lobe at the back of your head, for example, but whether or not
you actually perceive, recognize, or remember what you see depends on what's going on in a number of other parts, including the Parietal and Temporal lobes. Now that Zeman has enough subjects to study, he'll be analyzing their sensory skills, their life histories, and even their dreams at night to see how their brains can tell them about people, places, and things without being able to imagine them. And this research is especially timely because we recently lost one of the most famous figures in neurology and the study of perception. Oliver Sacks died on August thirtieth of cancer, and we didn't want this week to pass without acknowledging
what he taught us about the science of the mind. For fourty years, Sacks was a professor of neurology and Psychiatry at the Albert Einstein College of Medicine in New York, and he spent the rest of his career in Columbia University. But, unlike most other scientists we tell you about here, Sacks didn't do much laboratory research. He was kicked out of the first lab he worked in in the 1960s because he kept losing samples and breaking equipment. So, instead, he began seeing patients, and there he discovered the type of research that would frame his career: the case study.
Should You Eat Yourself
Hey, Vsauce. Michael here.And Jake. And Kevin. And we are in Santa Monica, which of course means that the quot;Vquot; in quot;Vsaucequot;will stand for the Roman numeral five, as in five questions from you guys. Our first question comes from quot;@notchquot;. He didn't ask this of me in particular,but I love how nonintuitive the answer is.Assume
an Earth that's perfectly spherical and a rope, stretched around the equator snugly. What would happen if that rope was just,say, six meters longeré Six meters isn't very much, but because of the relationshipbetween a circumference and a radius, six meters of extra rope would allow theentire rope to not fit snugly around the earth,
but one meter above it, all the way around. That's cool, but what if instead of a rope we used something more rigid, like a structure, a bridge and we built the bridge all the way around the Earth. And then, all at once, destroyed its supports. Would it floatéClearly the earth's gravity would pull the structure down,
but down is in the opposite directionfor the other side of the bridge. Well, it turns out such a scenario would be incrediblyunstable. Earth's gravity isn't equal everywhere, and if you follow @tweetsauceyou saw some great graphs showing just how much gravity changes, simply based on the density of rock below. When you factor in the Sun and the Moon,you wind up with a bridge structure that is not gonna stay where it is.If the bridge itself was indestructible, it would start
violently hula hooping around theearth, crushing things. But there's no known material strong enough to do that.Instead, you would wind up with bridge pieces flying everywhere. A sphere around the earth would be a bitmore stable, but a ringé Not so much. The ring, even if spinning, would rapidlybreak apart into smaller pieces. Last week you guys asked me a questionthat I have always wondered. Let's say I was stranded in themountains, waiting for rescuers to arrive,
but it was going to take a while.I had plenty of snow and plenty of water, but I was hungry dying of starvation would it make sense to amputate one of my legs and eat itéI mean,