Left-Handers Day: A time to celebrate the left stuff

Five of the last seven U.S. presidents have been left-handed, including Barack Obama. (AP Photo)
** FILE ** In this Nov. 12, 1999 file photo, Republican presidential hopeful. Sen. John McCain, R-Ariz. signs his papers at the Secretary of  State's office in Concord, N.H., to get his name on the presidential primary ballot. McCain still has his supporters in New Hampshire, a state where voters arguably know him as well if not better than his constituents back home in Arizona.  (AP Photo/Jim Cole, File)
It was an all-lefty major-candidate presidential field in 2008: Sen. John McCain’s a southpaw too. (AP Photo/Jim Cole, File)
Bill Clinton (The White House/Getty Images)
It was all-lefty field in 1992 too: Bill Clinton … (The White House/Getty Images)
Pres. George H. W. Bush, center, signs the North American Free Trade Agreement during a ceremony at the Organization of American States headquarters, Thursday, Dec. 17, 1992, Washington, D.C. Canadian Amb. Derek Burney and U.S. Trade Representative Carla Hills applaud during the signing. The president predicted an explosion of growth throughout North America as he signed the agreement. (AP Photo/Dennis Cook)
… President George H.W. Bush … (AP Photo/Dennis Cook)
… and Ross Perot. (AP Photo, File)
Melinda Gates, center, and Bill Gates, right, sign in during their meeting with Secretary-General Ban Ki-moon at the United Nations headquarters Friday, Sept. 25, 2015. The United Nations is conducting the Sustainable Development Summit with the goal of adopting of a post-2015 development agenda. (AP Photo/Kevin Hagen)
Visionaries of the tech world who are (or were) left-handed include Bill Gates … (AP Photo/Kevin Hagen)
… Steve Jobs … (AP Photo/Paul Sakuma, File)
… and Mark Zuckerberg. (AP Photo/Steven Senne)
Oprah Winfrey, star of magazine, screen, TV and whatever else she feels like being a star of, is left-handed. (Photo by Greg Allen/Invision/AP, File)
Music legend Paul McCartney is left-handed. (Photo by Chris Pizzello/Invision/AP)
Justin Bieber performs “Love Yourself” and “Company” during the iHeartRadio Music Awards at The Forum on Sunday, April 3, 2016, in Inglewood, Calif. (Photo by Chris Pizzellol/Invision/AP)
So is pop star Justin Bieber. (Photo by Chris Pizzellol/Invision/AP)
As is pop star Lady Gaga. (AP Photo/Matt Slocum, File)
Two current Supreme Court justices are left-handed: Ruth Bader Ginsburg … (AP Photo/J. Scott Applewhite, File)
… and Anthony Kennedy. (AP Photo/Denis Poroy, File)
The cast of NBC's "Seinfeld," is shown in this undated handout photo. Pictured from left are;  Michael Richards as Kramer, Jason Alexander as George Costanza, Julia Louis-Dreyfus as Elaine Benes and Jerry Seinfeld as Jerry Seinfeld. (AP Photo/Columbia/TriStar Television Distribution)
Don’t let the fists fool you: Jason Alexander (second from left) and Jerry Seinfeld (fourth from left) are left-handed. (AP Photo/Columbia/TriStar Television Distribution)
Tina Fey signs the book to collect her awards for outstanding lead actress in a comedy series, outstanding writing in a comedy series and outstanding comedy series for her work on "30 Rock" backstage at the trophy table at the 60th Primetime Emmy Awards Sunday, Sept. 21, 2008, in Los Angeles. (AP Photo/Kevork Djansezian)
So is comedy writer, producer and performer Tina Fey. (AP Photo/Kevork Djansezian)
FILE - US actress Angelina Jolie signs autographs for fans during the shooting of her directorial debut, a film called 'Untitled Bosnian War Love Story' in Budapest, Hungary, in this Wednesday, Oct. 13, 2010 file photo. Bosnian authorities have denied Jolie a permit to shoot her directorial film debut in the country amid protests by rape victims who object to its alleged subject matter. J olie's Sarajevo  producer, Edin Sarkic,  said  Friday  Oct 15 2010 that the rumors were not true. He says he has re-submitted the application and sent the film's full script to Sarajevo's  Culture Minister and expects to get a permit. (AP Photo/MTI, Bea Kallos, Pool, file)
Film star Angelina Jolie is left-handed as well. (AP Photo/MTI, Bea Kallos, Pool, file)
Jennifer Lawrence seen at Columbia Pictures World Premiere of "Passengers" at Regency Village Theatre on Wednesday, Dec. 14, 2016, in Los Angeles. (Photo by Eric Charbonneau/Invision for Sony Pictures/AP Images)
So is film star Jennifer Lawrence. (Photo by Eric Charbonneau/Invision for Sony Pictures/AP Images)
(1/18)
** FILE ** In this Nov. 12, 1999 file photo, Republican presidential hopeful. Sen. John McCain, R-Ariz. signs his papers at the Secretary of  State's office in Concord, N.H., to get his name on the presidential primary ballot. McCain still has his supporters in New Hampshire, a state where voters arguably know him as well if not better than his constituents back home in Arizona.  (AP Photo/Jim Cole, File)
Bill Clinton (The White House/Getty Images)
Pres. George H. W. Bush, center, signs the North American Free Trade Agreement during a ceremony at the Organization of American States headquarters, Thursday, Dec. 17, 1992, Washington, D.C. Canadian Amb. Derek Burney and U.S. Trade Representative Carla Hills applaud during the signing. The president predicted an explosion of growth throughout North America as he signed the agreement. (AP Photo/Dennis Cook)
Melinda Gates, center, and Bill Gates, right, sign in during their meeting with Secretary-General Ban Ki-moon at the United Nations headquarters Friday, Sept. 25, 2015. The United Nations is conducting the Sustainable Development Summit with the goal of adopting of a post-2015 development agenda. (AP Photo/Kevin Hagen)
Justin Bieber performs “Love Yourself” and “Company” during the iHeartRadio Music Awards at The Forum on Sunday, April 3, 2016, in Inglewood, Calif. (Photo by Chris Pizzellol/Invision/AP)
The cast of NBC's "Seinfeld," is shown in this undated handout photo. Pictured from left are;  Michael Richards as Kramer, Jason Alexander as George Costanza, Julia Louis-Dreyfus as Elaine Benes and Jerry Seinfeld as Jerry Seinfeld. (AP Photo/Columbia/TriStar Television Distribution)
Tina Fey signs the book to collect her awards for outstanding lead actress in a comedy series, outstanding writing in a comedy series and outstanding comedy series for her work on "30 Rock" backstage at the trophy table at the 60th Primetime Emmy Awards Sunday, Sept. 21, 2008, in Los Angeles. (AP Photo/Kevork Djansezian)
FILE - US actress Angelina Jolie signs autographs for fans during the shooting of her directorial debut, a film called 'Untitled Bosnian War Love Story' in Budapest, Hungary, in this Wednesday, Oct. 13, 2010 file photo. Bosnian authorities have denied Jolie a permit to shoot her directorial film debut in the country amid protests by rape victims who object to its alleged subject matter. J olie's Sarajevo  producer, Edin Sarkic,  said  Friday  Oct 15 2010 that the rumors were not true. He says he has re-submitted the application and sent the film's full script to Sarajevo's  Culture Minister and expects to get a permit. (AP Photo/MTI, Bea Kallos, Pool, file)
Jennifer Lawrence seen at Columbia Pictures World Premiere of "Passengers" at Regency Village Theatre on Wednesday, Dec. 14, 2016, in Los Angeles. (Photo by Eric Charbonneau/Invision for Sony Pictures/AP Images)

WASHINGTON — Monday is a day to celebrate all that’s left with the world: It’s Left-Handers Day, intended to recognize those who come at the world from a different angle, but often get to places right-handers don’t.

“Overall, it’s a good thing to be a left-handed person,” said Dr. Gholam Motamedi, Professor of Neurology at the Georgetown University School of Medicine and the director of the Comprehensive Epilepsy Center at Georgetown University Hospital.

He said he believes “left-handedness is good. There is a higher chance of being successful, educated, more intellectual.”

While left-handers make up about 10 percent of the population, five of the last seven U.S. presidents have been left-handed (Ronald Reagan was born left-handed but learned to write right-handed). They also have comprised the major-candidate presidential fields in 2008 (Barack Obama and John McCain) and 1992 (Bill Clinton, George H.W. Bush and Ross Perot).

Left-handers didn’t always have a day to celebrate. Indeed, left-handedness was once literally beaten out of children. As Rik Smits wrote in The New York Times, the British child psychologist Sir Cyril Burt once wrote that left-handers “flounder about like seals out of water,” and a decade later, the head of child psychiatry at Mount Sinai Hospital called left-handedness “an expression of infantile negativism.”

The practice stopped after World War II, Motamedi said, though it continues elsewhere — the very different proportions of left-handedness in Americans and, for one, Koreans, at different ages reflects that. And good thing, he said: “It’s like trading gold for copper!”

The doctor also said that left-handers have been shown to “develop abilities beyond ordinary people” and show more innovative thinking, as well as being overrepresented among those with autism and mood disorders such as depression. “Those are the extremes,” Motamedi said.

(For his own part, Smits, the author of “The Puzzle of Left-Handedness,” also wrote that “I found that the evidence of positive qualities associated with left-handedness was anecdotal at best, while the scores of studies associating left-handedness with all manner of afflictions were generally too unreliable to have any practical consequence.”)

What’s it all about?

But what causes left-handedness? That’s not clear. The 10 percent proportion of left-handedness is too large to be a stray aberration, but too small to be a random chance (otherwise the rate would be 50 percent, or close to it).

So something’s happening to cause left-handedness. But what is it? Motamedi said there are plenty of theories, but no one is sure yet. There are “tons of studies contradicting each other, [but] we don’t have a unifying theory.”

The right half of the brain controls the left, particularly when it comes to motor activity, he said; the left half controls the right. This is most apparent after a stroke; damage to the right side of the brain can result in paralysis in the left half of the body and vice versa.

One theory holds that “some insult or injury” happens to the left hemisphere during pregnancy or birth, and the right half takes over.

Another holds that it’s genetic, though the two theories can complement each other: Whatever condition causes an injury to the brain that causes left-handedness could be genetically caused, Motamedi said. Indeed, he said, identical twins can be differently handed, which leads to the conclusion that both nature and nurture — genetics and physical conditions — determine left- and right-handedness.

Some researchers have found a correlation to asthma, allergies and myopia so irregularities in body immunity could be the cause, Motamedi said. And the Geschwind theory holds that higher testosterone in the mother would similarly affect the brain, which would explain why there are more left-handed men than women, he said.

One thing’s for sure, said Motamedi: “You should always compliment left-handed people.” And he practices what he preaches: He said he’s “a poor right-hander, but just an admirer of left-handers!”

Left on!

Rick Massimo

Rick Massimo came to WTOP, and to Washington, in 2013 after having lived in Providence, R.I., since he was a child. He's the author of "A Walking Tour of the Georgetown Set" and "I Got a Song: A History of the Newport Folk Festival."

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