Nearly 30 Million People in the Us Are Lefthanded Clip Art
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Left-Handedness and Your Health
In that location'due south no denying it. Left-handers are the odd ones out.
Sure, lefties make up well-nigh 10 percent of the population — just, bluntly, it seems like society has forgotten nearly them. Simply consider all of the correct-handed gadgets, awkwardly designed desks, and cooking tools that fit comfortably only in your correct manus.
What causes someone to become a southpaw? Scientists aren't exactly sure, but research points to a complex collaboration between genes and environment. While no verbal set of "leftie genes" have been discovered, people who dominantly apply their left hands do have more left-handed family members. And researchers have constitute different brain wirings in righties vs. lefties.
Simply no matter what it is that drives someone to use their converse paw, science has as well uncovered a particular set of personality traits that left-handed people tend to take. So for all of you lefties, leftie-loving righties, and ambidextrous folks out in that location — it's fourth dimension to brush up on your left-handed noesis and help put an finish to leftie discrimination once and for all.
Lefties Have a College Gamble of Psychosis
Lefties make upwardly most 10 percentage of the full general population. Simply researchers accept found that in populations with certain mental disorders, that rate goes upwardly. Previous studies take found that people with psychosis had a xx percent likelihood of being left-handed, though a small written report in the periodical SAGE plant the rate of psychotic lefties may be even college. Researchers at Yale University in New Oasis, Connecticut, and the Academy of Texas Southwestern Medical Middle in Dallas assessed 107 patients at outpatient psychiatric clinics. For those with mood disorders such as depression or bipolar disorder, the rate of left-handedness was close to average, at xi per centum. But in people with psychosis, such as those with schizophrenia or schizoaffective disorder, the rate of left-handedness was 40 percent, well in a higher place average. Researchers theorize brain laterality plays a role.
Your Handedness May Determine Your Health
Scientists have likewise found an increased take a chance for dyslexia, ADHD, and certain mood disorders in left-handed people, according to a 2010 study published in Pediatrics. Researchers are non exactly sure how to explain this miracle, simply many believe it'due south related to how the brain is wired. Your noggin is divided into two halves: the left side and the correct side. Almost people (righties and lefties alike) rely on the brain'south left hemisphere for tasks similar linguistic communication functioning. But about 30 percent of left-handed folks are either partial to the right hemisphere or accept no ascendant hemisphere at all. According to scientists, having i hemisphere dominate is much more efficient, which is why some left-handers are at increased risk for learning impairments and brain disorders.
Just lefties may be in luck when it comes to other health conditions: Results of a large survey published in the journal Laterality found that left-handers had lower rates of arthritis and ulcers.
Lefties Hear Speeches Differently
People who use their left hands when listening may more than hands hear slowly-changing sounds than those who use their right easily, co-ordinate to a study from Georgetown University Medical Eye. The researchers who conducted the study, presented at Neuroscience 2012, found that the left and right hemispheres of the brain specialize in different kinds of sounds. The left hemisphere, which controls the right mitt, likes quickly-changing sounds like consonants, while the correct hemisphere, which controls the left hand, likes slowly-irresolute sounds like syllables or intonation.
According to the researchers, if you're waving an American flag while listening to a presidential candidate, the speech communication volition sound slightly dissimilar to you depending on whether you're belongings the flag in your left or right mitt. The research could ultimately result in improve treatment for stroke and language disorders.
Update: An earlier version of this post stated that people who use their left hands may more easily hear rapidly-changing sounds that those who use their right hands. In fact, left-handers hear slow-changing sounds better.
Left-Handed Neanderthals Were the Minority, Too
Right-handed bias isn't just a modern-day phenomenon: It turns out we've been dominantly using our right hooks for more than 500,000 years.
Academy of Kansas researchers recently adamant the handedness of ancient humans by studying — oddly plenty — their teeth. The study, which was published in the periodical Laterality, establish that when our great-great-great-great-(you lot get the point)-grandfathers processed animate being hides, they would hold one side of the carcass in 1 manus and the other in their mouth. By locating the wear and tear on those prehistoric chompers, scientists were able to determine whether our prehistoric ancestors were using their left manus or correct paw more dominantly
"All you need to have is a single tooth, and you can tell if our assumptions are right — if the private is right- or left-handed," report researcher David Frayer, Ph.D., told LiveScience. The results? "The fossils are just like humans in that we are by and large right-handed, and so were they."
Lefties Make Better Artists
Southpaws have been bragging about their creative ascendancy for years. Merely is it true — does being left-handed mean you're also more probable to be creative or innovative?
Co-ordinate to research published in the American Journal of Psychology, there is some show that left-handed people accept the upper hand in at least one artistic facet: They're ameliorate at divergent thinking, a method of thought generation that explores many possible solutions.
To decide whether lefties were more than probable to pursue artistic careers than righties, the folks behind the Left-Handers Club (a pro-leftie group dedicated to left-handed research and production evolution) surveyed more than than ii,000 left-handed, right-handed, and ambidextrous participants and constitute that lefties tended to find advantages and be drawn to careers in the arts, music, sports, and information-technology fields.
But that may also add together upwardly to lower paychecks: According to a study in the Wall Street Journal, left-handers' salaries are 10 pct lower on average than those of right-handers.
Nosotros Vote for Left-Handers!
It doesn't matter which mode they swing politically: A surprisingly high percent of recent U.South. presidents were on the left (in terms of handedness, of grade).
The lengthy list of left-handed leaders includes four of the last vii commanders in chief — President Obama, Bill Clinton, George H.Westward. Bush, and Gerald Ford — too every bit past presidents James Garfield and Harry Truman. In fact, there's a rumor that Ronald Reagan was born a leftie, but stringent schoolteachers converted him to a righty when he was young.
Should correct-handed presidential wannabes false it? Our penchant for left-handed POTUSes is probably pure coincidence. But one recent Dutch study suggests that left-handed politicians actually have an reward in televised debates. As a whole, people tend to associate right-handed gestures with "expert" and left-handed gestures with "bad," according to the researchers. Since boob tube presents a mirror prototype, the lefties are the ones who appear to gesture with their right hands (the "good" hand).
Southpaws Will Beat Yous in Sports
Golf fable Phil Mickelson, tennis ace Rafael Nadal, boxing champ Oscar de la Hoya — did y'all know that a number of your favorite sports superstars are lefties?
Really, left-handers may have the reward in sports that involve two opponents facing each other, such equally in tennis, boxing, and baseball game, according to an MSNBC review of the book The Puzzle of Left-Handedness, by Rik Smits. The author chalks it upwardly to the fact that left-handed athletes become a lot more opportunity to practice confronting right-handed opponents than vice versa (since there are and then many more righties out there).
Now that'southward a dwelling run for lefties.
Lefties Are Scaredy-Cats
Boo!
If you're a left-hander, that probably made you cringe. That's considering people whose left hands are ascendant tend to be more affected by fright than people who utilise their correct easily, according to research presented at an annual conference of The British Psychological Social club and reported in the Telegraph.
For the study, participants watched an eight-minute clip from the frightening motion-picture show Silence of the Lambs. When asked to think events from the segment, lefties were far more than likely to evidence signs of post-traumatic stress disorder than righties, including giving fragmented descriptions and making more mistakes.
"It seems that after experiencing a fearful consequence, even on picture, people who are left-handed had subtle behaviors that were like people suffering from post-traumatic stress disorder," head researcher Carolyn Choudhary, PhD, told the Telegraph. Arraign the brain: "It is apparent that the two sides of the brain take different roles in PTSD, and the correct manus-side of the brain seems to be involved in fearfulness. But nosotros need to exercise more experiments to understand what exactly is going on here," she said.
Grrr! Left-Handers Get Angrier, Too
If you just can't let become of that spat you had with your right-handed pal (just he seemed to move on but fine), you may exist able to blame information technology on your left-handedness. According to a small study published in the Journal of Nervous and Mental Disease, lefties are more decumbent to having negative emotions. In improver, they seem to take a more than difficult time processing their feelings.
Again, this seems to be related to the brain-hand connection. Compared to righties, left-handed participants in the study showed an imbalance in activity between the left and correct hemispheres when trying to process their moodiness.
Easily Embarrassed? Could Be Because Y'all're a Leftie
Aw-shucks. Lefties may go bent out of shape, but research shows they're just a bunch of bashful self-observers.
When scientists from Abertay Academy in Scotland gave 46 lefties and 66 rightiesbehavioral tests to measure their impulsiveness and personal restraint, the left-handers in the group more usually agreed with statements like "I worry near making mistakes" and "Criticism or scolding hurts me quite a flake." In fact, their answers left researchers believing that lefties tend to feel more inhibited, shy, and embarrassed than their right-handed counterparts.
"Left-handers are more likely to hesitate, whereas right-handers tend to jump in a bit more," lead researcher Lynn Wright, PhD, told BBC News.
Lefties Similar to Booze
Next time you have a run-in with a boozed-up barfly, cheque out which manus he's belongings his whisky with: chances are, it'll be his left.
For years, myth has held that left-handers are more likely to become alcoholics. Research into the topic was murky, however, and relied on small samples. But a survey of more than 25,000 people from 12 countries has cleared things upwardly a bit. While lefties are non more prone to alcoholism, they do drink more oft.
Researcher Kevin Denny, who examined the data for a newspaper published in the British Journal of Health Psychology, says the chief takeaway should be debunking that whole left-handedness-alcoholism link. "In that location is no evidence that handedness predicts risky drinking," he stated in a press release. "Hence, the results exercise not support the thought that excess drinking may be a upshot either of atypical lateralisation of the brain, or due to the social stresses that arise from left-handers' being a minority group."
They Take Their Own Day!
Marker your calendar: Baronial 13 is International Left-Handers Mean solar day.
Lefties across the globe celebrate the annual event, which was launched in 1992 by the Britain-based Left-Handers Order to increase awareness about the left-handed lifestyle. According to the group's Web site, information technology'due south a mean solar day "when left-handers everywhere can celebrate their sinistrality and increase public sensation of the advantages and disadvantages of being left-handed."
How should you detect the occasion? Create a "leftie zone": a designated expanse of personal infinite where everything must exist done in a left-handed fashion, from your workspace setup to the manner you apply cutlery.
And that rule also extends to whatever right-handers who happen to enter the leftie zone.
Lefties Aren't Going Anywhere
Left-handers are the minority. So does that mean they'll go extinct one solar day? In fact, some researchers believe that when it comes to survival of the fittest, lefties come out on top.
Here'south why: In one-on-one combat, using the left-paw is like throwing a curveball. "The fact that left-handers are less common means they have a surprise effect," University of Montpellier researcher Charlotte Faurie told ABC News. To dig deeper, Faurie and her colleague Michel Raymond studied nine different primitive societies. In more vehement societies, they constitute, lefties thrived (think southpaw slugger Rocky Balboa'southward left claw).
Looks like the left hand has the upper hand later all.
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Source: https://www.everydayhealth.com/healthy-living-pictures/little-known-facts-about-lefthanders.aspx
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