Left-handed people had been under scrutiny and had been the subject of curiosity for many centuries. Researchers today have recognized that the dominating hand does have an effect on a person, including his or her health.

Handedness or the dominance of one hand (either left or right) over the other is used by some scientists to learn how the brain of the person functions. Experts now use this criterion to understand why some people get brain-related problems, such as dyslexia, attention deficit hyperactivity disorder (ADHD), and schizophrenia. This is because it has been discovered that most people who suffer from these conditions are left-handed.

According to estimates, 10% of the population is left-handed and it is discovered that 20% of schizophrenics have their left hand as the dominant hand. There was also a study back in 2009 that looked into the effect of being left-handed where it was discovered that children of four to five years of age may not perform well in school. This is because they often have a problem with their development, particularly mentally. They find it difficult to read, copy, and write symbols or words.

Higher Chance of ADHD and Psychotic Disorders

Due to the delay in brain development, most of those who are diagnosed with attention deficit hyperactivity disorder (ADHD) as well as dyslexia are left-handed people. Aside from these two, lefties are also linked to having higher chances of acquiring psychotic disorders, including bipolar disorder, schizophrenia, and similar mood disorders.

Why Lefties are at Risk

Don't let your left-handed friend be left behind, share with him/her this article / PicHelp
Don’t let your left-handed friend be left behind, share with him/her this article / PicHelp

Being left-handed does have an effect on how the brain works. According to some researchers, lefties are exposed to a few health problems because of their brain’s hemisphere. For right-handed people, the dominant part of the brain is the left hemisphere, which is responsible for most language processing. There are left-handed people with the same dominant hemisphere, but there are some – about 30% – that has the right as the dominant hemisphere. When the right hemisphere is more dominant, brain disorders are more common.

Is There Anything Good about Being Left-Handed?

Being left-handed does not mean it’s full of disadvantages. In fact, on average, right-handed and left-handed people usually don’t have a huge difference in their IQ. This smashes the myth that righties have higher IQs than people with dominant left-hand. There are also studies that support how lefties are much better at developing new concepts, which strengthens the belief that they are on the creative side.


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