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The mystery of why left-handers are so much rarer (2016)

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Re: The mystery of why left-handers are so much rarer (2016)

#51
I write left handed, and use a fork in my left and knife in my right. Left hand for holding a phone or a drinking glass, and for shaving.

I'm right eye dominant, though, so I throw, swing, shoot, use scissors, play instruments and use a mouse right handed.

I'm not at all ambidextrous, I can't do most of those things with my other hand.

Re: The mystery of why left-handers are so much rarer (2016)

#52
post #45
post #24

I'm of the generation that were forced to write with the right even though I was a natural lefty. I also broke my left arm when I was 2, which may have made things even more messed up. These days I: * Write with my right, my left is not quite as quick/tidy as my right * Swing/grip with my left (cricket / golf / etc) * Use my phone with my left * Mouse with my right * Cut (scissors) with my right (but we don't have an…

Yeah my body is all kinds of confused also: - Write with my left - Cricket/golf right - Tennis/squash left - Bowl/throw left - Mouse right - Drink left - Eat right (fork in left hand, knife in right) - Cut left (but usually don't bother because scissors never work) - I also kick well off both feet (although favor the left foot slightly) I'm definitely more left dominant but can usually do most things well enough with…

Oh bowling - I do that with both hands, equally bad at each (well, maybe slightly better with the left).

Re: The mystery of why left-handers are so much rarer (2016)

#53
post #8

I was originally left-handed, but my father made me switch to my right hand because he believed being left-handed was the "hand of the devil." Now, I’ve become ambidextrous, and I instinctively choose which hand to use depending on the activity. Sometimes, when I'm trying something for the first time and I'm unsure which hand is best, I get stuck and have to go through some trial and error before it feels natural.

I always use left hand for everything that does not requires right hand. The only activities I need to use right hand is when I use a desktop computer or writing. I was tried to use right hand for the other activities but it is never comfortable no matter how much I practice.

Re: The mystery of why left-handers are so much rarer (2016)

#54
Left handed. Right eyed. Right eared. Mouse with right because I had to in 1992. Overall, I’m unhappy with my brain, so my vote is on it being a bad thing. It’s very discouraging in a left to right language society to smear your own handwriting constantly. Also, guitar tabs and all kinds of other things are built for the majority. I’d much rather be right handed.

Re: The mystery of why left-handers are so much rarer (2016)

#55
post #38

I lost a little faith when I saw the article referred to Neanderthals as "our ancestors"... Intrigued by the throwaway comment that we know handedness is genetically determined. Is that true? I was under the impression it was a developmental issue (identical twins with opposite orientation being one piece of evidence here).

I remember an article in Nature that’s better than this one. Stats:

Men are 13%, women 9% Being a twin is very high, like 17% Scandinavia is 13%, China <3%

Re: The mystery of why left-handers are so much rarer (2016)

#56
post #44

Earlier quoted context omitted.

I'm not sure why people have started to make reversed musical instruments. I saw a video with a reversed piano, calling it "left-handed." I am a left-handed person who plays the piano and I had always thought the keyboard was laid out like an ascending scale on paper rather than having something to do with handedness - low notes on the left and high notes on the right. The motions involved in playing music are so wei…

I taught guitar for three years to groups of undergrads. I noticed that most lefties had no problem playing a right-handed guitar. However, occasionally I would have a student that just struggled mightily and things clicked when they switched to a left-handed guitar.

I went to a Don Ross workshop once and there was a left handed player there doing the upside down RH guitar thing, which was especially impressive due to the style of music and having to play the bass notes with their pinky.

Re: The mystery of why left-handers are so much rarer (2016)

#57
post #42
post #38

I lost a little faith when I saw the article referred to Neanderthals as "our ancestors"... Intrigued by the throwaway comment that we know handedness is genetically determined. Is that true? I was under the impression it was a developmental issue (identical twins with opposite orientation being one piece of evidence here).

I lose a little faith when I see people nitpick while being wrong.

"Neanderthals were our ancestors" is more wrong than it's right.

Re: The mystery of why left-handers are so much rarer (2016)

#58
post #24

I'm of the generation that were forced to write with the right even though I was a natural lefty. I also broke my left arm when I was 2, which may have made things even more messed up. These days I: * Write with my right, my left is not quite as quick/tidy as my right * Swing/grip with my left (cricket / golf / etc) * Use my phone with my left * Mouse with my right * Cut (scissors) with my right (but we don't have an…

One interesting data point is the majority of hockey players shoot left but are not left handed.

https://www.purehockey.com/c/why-are-so-many-hockey-players-...

Re: The mystery of why left-handers are so much rarer (2016)

#59

“ when you look at rare conditions, like Down Syndrome, epilepsy and cerebral palsy, the ratio of left- to right-handers is more like 50:50 rather than 1:10.” Is this a typo? Or are left-handed people way, way more likely to suffer from these rare diseases?

People who have them are more likely to have other disturbances. One of the few things I recall clearly from embryology in med school is that any disturbance of the midline and sided structures of the body often reflects some abnormal development: there's rarely only one (e.g., if their brain is abnormal, you had better look for cardiac abnormalities).

Left-handedness is unusual, but not per se pathologic. There is a running joke among neurologists that the average neurologist is a left-handed person with migraines. They aren't all, of course, but if you had chronic headaches and were left-handed, wouldn't that predispose you to pursuing a specialty where you try to figure out what's going on in brains? I majored in chemistry; it's not a huge stretch to imagine why I became an anesthesiologist. It's interesting, and it makes some intuitive sense. We tend to be more of the "analyst" personality; former engineers and accountants are not rare in anesthesia.

Re: The mystery of why left-handers are so much rarer (2016)

#60
post #41

Earlier quoted context omitted.

I'm not sure why people have started to make reversed musical instruments. I saw a video with a reversed piano, calling it "left-handed." I am a left-handed person who plays the piano and I had always thought the keyboard was laid out like an ascending scale on paper rather than having something to do with handedness - low notes on the left and high notes on the right. The motions involved in playing music are so wei…

Piano music is mostly written by right-handers for right-handers. I'm strongly left-hand dominant. For music that's intended to be easy to play, the primary voice is almost always on the right hand. Where the music wants the most dexterity, I have the least. At the developed level where the composer doesn't give a damn about how easy it is for the musician to play, yes, both left and right-handers have to figure out…

I don't think that's the actual reason, even for teaching music. The primary voice is in the right hand because the right hand is higher and so the waves it generates have higher energy at the same volume, making it the easiest voice to hear. I assume that in arrangements and pop music, the arranger naturally puts the melody on top and fills in as much harmony as they care to (which is usually not a lot unless you pay for the arrangement).
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