this post was submitted on 23 Dec 2023
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The Toungue map.
The idea that different parts of the tongue are responsible for feeling different tastes. This blatantly false idea was made up in 1901 out of thin air and then made its way into biology classrooms somehow. It was taught to schoolchildren (including me) for about 100 years as a biological fact, even though every human being in that time proved it false by experiment thousands of times by eating things and tasting them with the "wrong" parts of the tongue. It doesn't quite count as an example of this happening today, because we finally realized that it simply wasn't true and have stopped teaching it, but still: 100 years is a long time to realize that something is false when every human being in the world is confronted with physical evidence several times every day.
Its still being taught at least in Romania
It's what I was taught in American public school ~15 years ago
I don't think this is actually a myth. I think there's an extreme version of the statement, but it nevertheless is true that there are specialized taste buds and that they aggregate on sections on the tongue.
And I think there's a whole rabbit hole here, of overeager "corrections", that are not in fact corrections but just someone engaging in bad faith with a statement that's close enough to the actual truth. It's actually more wrong to categorically dismiss it, then it would be to note the difference between it and the truth, which is to say while they are not strictly regions, they're nevertheless as attested to be the NIH:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8956797/
In my opinion, the more interesting phenomenon is understanding how these facts, and the temptation to correct, challenges our ability to sustain nuance and to carefully differentiate between degrees of truth, instead of just making blanket denials.
Getting in to the fine details of it is important for researchers or doctors who specifically work with the tongue, but the issue that we're talking about here is how this was commonly taught as absolute fact to young children with no nuance and seemingly for no reason other than it being widely believed.
If anyone is specifically claiming that the tongue is completely uniform in taste reception then they're it taking too far, sure. But generally when I see this brought up, the focus is on questioning the process of how some facts make it in to what schools teach as "common knowledge" even when they are both wrong and unimportant to daily life and general education.
When a teacher tells a 6-7 year old that flavors can only be tasted on certain parts of your tongue, the problem isn't that they failed to call it a "spatial component to our experience of gustatory stimulus". At that age, teachers have to strip out most nuance from any lesson, and the goal is to find a way to explain things that is true enough while still being understandable to young children.
So why, if stripping out the nuance makes it basically wrong, did teachers keep teaching it for a century? Even if it were true, it's not really important information for most people. Necessarily even, because if it were important to daily life, it would be a lot easier to notice it's mostly wrong.
I don't know, and I don't think there's an exact reason. I had teachers tell us about this, then seem to realize they needed a reason for it to matter and try to turn it in to a lesson about scientific inquiry. They told us to go home and try putting flavors on the 'wrong' parts of the tongue and notice how we couldn't taste anything. I tried it once, and it didn't work, and it was never brought up again.
Feel free to educate people about the mechanics of our sense of taste, but I think this is a fine example of myths making it in to what's taught in schools.
I lost points in third grade for being wrong about this. My map was all over the place and reflected where I could taste each flavor