Why are some people left-handed? An evolutionary perspective

Why are some people left-handed? An evolutionary perspective

Lefties historically have had a tendency to get left behind. Until relatively recently, being left-handed was stigmatized , sometimes as an abnormality or sign of weakness. Left-handed children were forced to learn to write with their right hands, often to their significant disadvantage. For one thing, lefties have comprised roughly 10 percent to 15 percent of the general population for many thousands of years. The fact that the trait has remained stable over many generations suggests that left-handedness is not an evolutionary weakness, as many psychologists of the past believed. But handedness does come with certain physiological and neurological differences. Research remains incomplete, but here are some things we know about the unique cognitive and psychological profiles of the left-handed:.

10 Things Lefties Do Better

One really interesting factoid that I picked up was from a scientist who believed that left handed people tended to be more independent as a result of having to adapt to a world which is largely built for right handed individuals. Here are a few more fascinating pieces of trivia related to being a lefty…. However, the percentage of lefties worldwide is slowly creeping up as being left handed becomes more socially accepted.

Believe it or not, to this day some countries still try and force children to learn to write with their right hand! Us left handed guitarists are an even rarer breed!

Left-handedness is much more than a trivial paw preference: It may be a useful Western European cave artwork dating back 10, to 30, years. if a person suddenly lost the ability to use his or her dominant hand?

Since prehistoric times, left-handed individuals have been ubiquitous in human populations, exhibiting geographical frequency variations. Evolutionary explanations have been proposed for the persistence of the handedness polymorphism. Left-handedness could be favoured by negative frequency-dependent selection. Data have suggested that left-handedness, as the rare hand preference, could represent an important strategic advantage in fighting interactions.

However, the fact that left-handedness occurs at a low frequency indicates that some evolutionary costs could be associated with left-handedness. Overall, the evolutionary dynamics of this polymorphism are not fully understood. Here, we review the abundant literature available regarding the possible mechanisms and consequences of left-handedness.

Inside the Mind of a Left-Hander

By Amanda MacMillan, Health. But aside from making it tough to cut a straight line with a pair of scissors designed for righties, being a southpaw can also have some subtle effects on our physical and mental health. Chat with us in Facebook Messenger. Find out what’s happening in the world as it unfolds. Photos: Famous left-handers.

Barack Obama is the latest in a string of left-handed U.

It is strange but I realized that I am attracted to left handed guys. This guy is left handed, my recent ex is left handed, my ex fiancee looks left handed. I am talking​.

Sure, lefties make up about 10 percent of the population — but, frankly, it seems like society has forgotten about them. Just consider all of the right-handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your right hand. What causes someone to become a southpaw? And researchers have found different brain wirings in righties vs. But no matter what it is that drives someone to use their antipodal paw, science has also uncovered a particular set of personality traits that left-handed people tend to have.

Lefties make up about 10 percent of the general population. But researchers have found that in populations with certain mental disorders, that rate goes up. Previous studies have found that people with psychosis had a 20 percent likelihood of being left-handed, though a small study in the journal SAGE found the rate of psychotic lefties may be even higher.

For those with mood disorders such as depression or bipolar disorder , the rate of left-handedness was close to average, at 11 percent.

Frontiers for Young Minds

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The internment of a ship at Sutton Hoo represents the most impressive medieval grave to be discovered in Europe. But who was buried there and what did it reveal about this period in history?

There was once a time (a long time ago), when people believed that being left-​handed meant a person was more prone to “dealings with the.

This paper is about a little studied aspect of Humanity and one of the last unorganized minorities in society. It x-rayed handedness and its types. The frequency of left-handedness is greater in Euro-American than in oriental cultures and restrictions on using left hand are ingrained in the belief system and social interpretation in a given culture. The descriptive research approach was used to unravel what the Bible and the Quran say about Left-Handedness.

The right hand is mentioned positively times in the Bible, while the left hand is mentioned only 25 times, all negatively. The dominant hand is always stronger than the other arm, and 90 per cent of people are right handed. By implication, in the vast majority of people, the right hand is stronger. Thus, the Bible uses the right hand as a symbol of strength and honor and stated that in the left hand are riches and honor.

The Sunnah of the Prophet illustrated that it is desirable to use the right hand in everything that we wish to honor. Handwriting is a highly valued and prized skill.

Being Right-Swiped as a Dalit Woman on Dating Apps

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Left-handedness is more common in men than in women, and tests of fetuses (​using ultrasound) show 92% sucking their right thumbs, a figure.

Please refresh the page and retry. D r Michael Proulx, from the department of psychology at the University of Bath, said: “This study is unique in giving us a look into a private behaviour in a private culture with implications for all people. It turns out, we as humans are similar even if our social values differ. This is specific to the functions in the left cerebral hemisphere, located in the emotion and decision related areas of the brain.

Hormone levels, such as testosterone, might be unevenly distributed in each hemisphere, causing a bias to turn right. It is hoped the findings will feed into further studies of neurophysiological mechanisms of such behaviours. We urge you to turn off your ad blocker for The Telegraph website so that you can continue to access our quality content in the future.

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The greatest left-handed musicians and how to become one

While most people prefer to use their right hand to brush their teeth, throw a ball, or hold a tennis racket, left-handers prefer to use their left hand. There was a time not so long ago when left-handers were stigmatized see Glossary in Western and other communities: it was considered a bad sign if you were left-handed, and left-handed children were often forced to write with their right hand.

This is nonsensical: there is nothing wrong with being left-handed, and trying to write with the non-preferred hand is frustrating for almost everybody.

Since prehistoric times, left-handed individuals have been ubiquitous in right hand dominance in Neanderthal skeleton samples (dating from approx. The frequency of left-handers among homosexual men seemed to be.

And follow Redbook on Pinterest for more parenting content! Prepare to have your mind blown: Six out of the last 12 U. Only 1 out of 10 people in the general population share that same trait, so that’s a pretty wild percentage. What is it that makes a leftie so presidential? No one is quite sure of the exact reason, but one Stanford study found that those with a dominant left hand are better at “divergent thinking,” which means they’re good at coming up with fresh ideas from existing information — definitely a useful skill for a president.

One possible reason for the link between lefties and huge wealth? A study published in the Journal of Experimental and Clinical Neuropsychology JECN found that lefties possess key traits related leadership — including inhibitory control and working memory operations — which may make them better suited for business. You may have heard that left-handed people are more creative than right-handed ones, and there may be a grain of truth to the old adage. Lefties have more “mental flexibility” than the rest of the population, according to that JECN study.

A leftie is more likely to think out-of-the-box and be creative — perhaps like fellow lefties Justin Beiber, Lady Gaga, Jon Stewart, and Jerry Seinfeld. Lefties seem to have some protection against ulcers and arthritis, according to a surprising study published in the journal Laterality: Asymmetries of Body, Brain and Cognition.

Study Reveals Why Lefties Are Rare

A person who is left-handed primarily uses his or her left hand, more so than the right hand; a left-hander will probably use the left hand for tasks such as personal care, cooking, and so on. Writing is not as precise an indicator of handedness as it might seem, because many left-handed people write with their right hand but use their left hand for other tasks.

Left-handedness, in comparison to the general population, also appears to occur more frequently in identical twins, and several groups of neurologically disordered individuals people suffering from epilepsy, Down’s Syndrome, autism, mental retardation, dyslexia, etc.

Research shows that men are more likely to be left-handed than women. Female left-handers seemed to be rarer than male left-handers.

But, the truth is, dominant-hand bliss is actually total BS for most left-handed people. The same goes for lovers. Give me a more intriguing, challenging object of curiousity any day over over an easy-to-operate system or device… therefore, dear universe, please gift me with a beautiful lefty to love. Back in my undergrad years. He was beside himself with pride that he remembered my left-handedness without me reminding him.

He thoughtfully positioned my mouse on the left-hand side of the computer. My family always got a kick out of watching me struggle with the can opener — sometimes taking upwards of five minutes just to pierce open half the lid to a can of tomato soup, only to then dangerously pry the jagged metal with my left hand in sheer frustration. Righties might have a more dominant left hemisphere, but lefties tend to have more symmetrical brains, processing information in both hemispheres.

But given all the years any given lefty spends struggling to adjust to the right-handed world, our left hemispheres are pretty kickass too. Apparently, lefties are better in bed too — or at least more sexually satisfied than right-handed people. The former Senior Editor of Strut Magazine and Passport Editor of enRoute, she has interviewed Justin Timberlake in the penthouse of the Chateau Marmont, talked film over tea with Keira Knightley and gone head-to-head with Kanye West in an unedited battle of the egos.

She has a Master’s degree in English literature from McGill and is currently working on her first book. Join the Conversation Facebook 6K Likes.

What Do Left-Handed People Have To Deal With That Right-Handed People Just Don’t Get



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