Hand Dominance – Will She Be a Lefty or Righty?

Hand dominance is a term that describes your child’s preference to use the right or left hand to perform most tasks in her daily live. These task can range from holding a spoon, or stacking blocks, to drawing and writing. The hand that is dominant is not necessarily stronger than the other one. Your child just prefers to use it to do most things.

Consistent hand dominance starts to develop somewhere between two and three years of age. This development is usually fully completed by age 6 years. As the brain matures and its functions begin to differentiate, you will notice that hand dominance begins to emerge in your child. Hand preference that appears before the age of 18 months may signal impaired neurological control of the other hand and a health care provider should be consulted. Since hand preference is determined by your child’s brain development, “forcing” your child to use the non-dominant hand more often may me futile.

Hand dominance is determined largely by genetics. Studies show that only 2% of children of right-handed parents are left-handed. On the other hand, 42% of children with left-handed parents are left-handed.

In the history of many nations, being left handed was associated with social stigma. In many languages, including English, the word “right” also means “correct” or “proper.” On the other hand, the Latin word “sinistra,” from which the English word sinister was derived, meant “left,” “malicious,” or “sinister.” Being a righty or a lefty has nothing to do with being a good person. However, being ambidextrous may come in handy from time to time!

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Published in: on May 27, 2010 at 9:33 am  Leave a Comment  

Left-Handed Golf Instruction

The world’s population may be 10 to 15% lefties, but there are not many left-handed golfers. The main reason is that most of them prefer to stick to right-handed golf. In addition, it used to be quite difficult to come across left-handed instruction manuals and left-handed golf clubs.

But that is a thing of the past now, since more and more golf instruction manuals are being targeted to lefties. The top coach Steve Anderson has authored the book ‘On the Other Hand’, which is meant for left-handed golfers. Bob Charles is one of the best left-handed golfers in the world and he has put together an instruction video, the only one of its kind, to give insight on how he achieved success as a lefty golfer. The game of golf also lays stress on playing it more with your eyes than your hands.

Some famous lefthanders are quite ambidextrous this way, using their left hand only for the game and their right for everything else. Experts say that it is required to look at the ball first and visualize it going away from your body. That will show you which side of the ball to take. The world has seen very few top left-handed golfers.

But these instructional tutorials might prove helpful to hone talent. They give you clear and comprehensible instructions on how to play your game the left-handed way. You get more insight on your full swings, putting and even game management. Mike Weir and Phil Mickelson are the two names that appear together with Bob Charles as the world’s top three left-handed golfers.

Left-handed equipment might also be difficult to come across, but there are some sites which offer a wealth of it. Golf Smith and The Golf Warehouse are two international sites that stock a wide range of these products. Edwin Watts of U.S.A. and Online Golf in Europe have also been serving a long line of such web customers.

Golf Instruction provides detailed information on Golf Instruction, Free Golf Instruction, Golf Swing Instruction, Online Golf Instruction and more. Golf Instruction is affiliated with Top Golf Schools.

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Published in: on May 25, 2010 at 11:44 am  Leave a Comment  
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A Left Handed Bread Knife – YIPEE!

Not long ago, my mother-in-law came to visit, and as per usual, she would bring me things that she no longer wanted from her house. Being left handed, most of these gadgets were useless to me.

I have been married for 29 years, and this has become a familiar ritual with our family.

She was always bringing me cutlery that “didn’t work” or scissors that “didn’t cut”

Which brings me to her “well meaning gift”. She shows me this large bread knife, and says “You can have this dear, because it is too dull and does not cut for me”. Besides, thinking the obvious, about why someone would give away a dull bread knife for a gift, I politely took it, and put it away to be discarded later.

A few days later, I had made a fresh loaf of bread in my bread maker, and grabbed this bread knife, and by habit, put it in my left hand. Up until now, you must understand, I can’t carve anything with a knife, as I completely shred it in my left hand, or worse yet, injure myself. But I looked at this knife and realized, that there was nothing wrong with this bread knife, it was perfect for me.

This bread knife was a left handed bread knife, and yes there is a difference! The serrations on the knife are on the opposite side to a regular right hand knife. I was stunned and amazed, that there was such a thing, and I made a beautiful cut in the loaf of bread.

Even though left handed people are only 7 to 10% of the population, it is nice to have something created for a left handed person.

I have since found that there are companies now, that make everything from left handed bread knives, to carving knives, can openers, pens, rulers, tape measures, even left handed note books… and the list goes on. So there is no more struggling with right handed gadgets for me.

So, all you left handed creators out there, give yourself the gift of left handed tools and products that will make your life easier in this right handed world!

This was the best gift I got from my mother-in-law yet!

http://www.make-crafts-for-cash.com/lefthanded.html click here to find many great left handed products. Worldwide shipping. Make your life a little easier if you are left handed, or you know someone who is left handed. Article and website by Diane Palmer

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Published in: on May 24, 2010 at 1:45 pm  Leave a Comment  

Betta Splendens Are Right And Left Handed?

What?! The Betta Splendens, better known as betta fish to the tropical fish hobbyist, actually shows left- and right-handed preferences? In raising bettas for twenty years, I do not think I have ever noticed this or given it much thought for that matter, but lead researcher Yuichi Takeuchi of “Behavioural Brain Research” has studies that show exactly that. Takeuchi also explains that the studies show a corresponding body symmetry as well.

This may mean that bettas have a “good side” and “bad side” just as we humans think we do when taking pictures. In these studies, Takeuchi wanted to answer three questions:

  • When flaring, or showing aggression, did betta splendens consistently favor one side or another to present to his opponent?
  • Are there differences in the appearance or physical characteristics in betta fish from left to right side?
  • Are differences in bettas’ body shape directly linked to which side the fish displayed when flaring (showing aggression)?

As it turns out, bettas were the perfect candidate for such a test because they show hyped-out aggressive behavior patterns at predictable times and can easily be made to enter this type of behavior. When male bettas see another male betta, or even other species of fish that resembles a male betta, they extend their fins and tail as high and long as possible, puff out their chest, and will even attack if the fish is in the same tank.

In the first phase of the experiment, Takeuchi noticed that when placed in an eight-sided betta tank with mirrored walls, a little more than half the betta fish showed a left or right-sided inclination for their aggressive behavioral displays of aggressions. “Right-handed” bettas were more likely to flare their right sided gill covers, and left dominant bettas the left side.

In the next stage, the researchers looked for tiny differences in the physical makeup of the fish. They paid special attention to the angle at which the fish’s spine contacted its head. The vast majority of betta splendens had a sever right or left bend to their backbone.

Lastly, Takeuchi then looked at both sets of data in respect to the other. Did the bettas prefer their right or left side because of the bend in their backbone, or did they get the bend because they had favored that side in the first place? Amazingly, the fish that preferred one side or the other had a bend in that direction.

Dr Claire Inness posted this news on Practical Fishkeeping.

Want to know all about betta fish, and total betta care? Check out the Betta Blog at http://www.BettaFacts.info for more great Betta Fish news and articles.

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Published in: on May 21, 2010 at 6:01 am  Leave a Comment