04:00 a.m
Sunday, October 13, 2024
A study conducted by British researchers revealed that people who use their left hand are at risk of developing health problems.
There are reasons why the dominant hand may affect health, including genetics and environmental factors.
breast cancer
Some older research links left-handedness to breast cancer, according to Healthline.
But many of these studies only examined small numbers, and a 2016 study found that breast cancer developed an average of two years earlier in left-handed people, suggesting that early screening may be warranted. left handed people.
The researchers said the increased risk of breast cancer in left-handed people may be due to increased exposure to estrogen during pregnancy, which they believe contributes to left-handedness. .
However, recent research has not been able to draw a link between fetal estrogen and left-handedness.
Schizophrenia
A study conducted in 2014 revealed that people with schizophrenia were more likely to use their left hand or use both hands.
The researchers suggested that genes were responsible for predicting how the two sides of the brain divided their functions, a process known as lateralization.
Researchers say that schizophrenia may develop as a result of lateral reduction in the brain, which may be a more common trait in left-handed people. A 2019 study supports these results, with brain imaging and genetic studies.
A 2024 study also found that people with schizophrenia are twice as likely to use mixed hands than those without schizophrenia.
Mental health
A 2019 study noted a link between being left-handed and many mental health symptoms, including changes in mood, feelings of anxiety or worry, irritability, insomnia, and neuroticism. left handed and depressed.
Advantages of the left hand
Although lefties may have some disadvantages from a health risk perspective, they also appear to have some advantages. A 2021 study reported that physical activity among left-handers could improve verbal fluency, and recognizing and processing objects and faces.
Research in 2019 showed that left-handed users are less likely to develop Parkinson’s disease, possibly due to a genetic link.
Finally, a 2017 study showed that left-handed athletes in some sports are overrepresented in the general population. For example, while about 10% of people are left-handed, about 30% of elite catchers in baseball are left-handed.
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2024-10-13 01:00:00
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