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Left -handness and certain neurological disorders It could go hand in hand, a new study revealed, although researchers and others have recognized potential restrictions.
While about 10% of people in the world to the left, People with autism They are 3.5 times more likely to have a trait, according to an international researcher team who analyzed data over 200,000 individuals.
The study, published in the Psychological Bulletin, showed that the left and mixed hand also occur more often in people who have diagnoses such as schizophrenia, autism and intellectual difficulty.
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A mixed hand refers to a situation where people can use the left hand for a particular task and right hand for others, according to psychology experts.
This is a little different from the ambidexterity, which is equal to the use of both hands.
The study has shown that left and mixed hands appear more often in people who have certain diagnoses such as schizophrenia, autism and intellectual disability. (East)
“The key moves of this study are that changes in the preference of the norm from the norm (ie the right) are related, especially with psychiatric and psychological conditions that affect the language system (eg dyslexy or schizophrenia) or affect neuro developments over early age (eg autism or adhd), “Author Dr. Julian Packheiser told Fox News Digital.
The researcher is at the Institute of Cognitive Neuroscience at the University of Ruhr Bochum in Germany.
“Correlation does not imply causable-at-effect connection to the left does not mean that someone will develop autism or schizophrenia.”
Not all neurological conditions have shown a relationship with the dominant hand of people.
Depression and discalculia (Disability of mathematical learning), for example, has not shown a significant difference in hand preference compared to control groups, the study showed.
Linguistic factor
Researchers have also found that “atypical surrender” can be associated with long -term linguistic symptoms such as stuttering and dyslexia.
“In most people dominant Side of their brain It is usually where there are speech, language, logical processing of thoughts and a tendency of hands, “said Dr. Earnest Lee Murray, a neurologist of West Tennessee Medical Group, for Fox News Digital.
Was not involved in a new study.
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“People who are left-handed or ambiextrous often do not have such a dominant one-sided brain-ladies, key parts of the tongue can be divided between both sides,” Murray said.
The study also examined the likelihood of atypical commitment to the clinical population or group of people diagnosed with a certain set Health states compared to the control population.
The earlier symptoms of the disorder appear to have appeared, more often the researchers saw cases of the left and the mixed hand. (East)
“We doubted that the left and mixed hand could be associated with disorders whose symptoms were associated with the language,” Packheiser said in a statement to the public.
“Language, such as commitment, has a very one -sided place in the brain, so there is a reason for the development of both their disorders and disorders.”
The time is crucial
Researchers have also considered other factors that could occur, such as an age at which a person can show symptoms.
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It seems to be earlier a Symptoms of disorder Created, more often, researchers saw cases of left and mixed hands.
Researchers assumed that left and mixed hand can be associated with diseases that happen very early in life because the dominant hand is determined in a very early age- maybe even even Before birth.
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In the uterus, sucking thumbs at 10 weeks of gestation is strongly associated with which the hand will be preferred later in life, they noticed.
The connection could help the experts potentially understand the way of organizing the brain and how they develop.
The new study comes with potential limitations. Not all neurological conditions show a relationship with a person’s dominant hand, experts say. (East)
“The study has implications in understanding the way of f throughout the neurorehabilization of patients with unilateral brain conditions, such as stroke, multiple sclerosis Or a traumatic brain injury, “Murray said.
Potential limitations
Jonathan Alpert, a psychotherapist and author based in Manhattan, said the study was “interesting”, although he emphasized his limitations.
“Correlation does not mean a cause-effect to be left to the left does not mean that someone will develop autism or schizophrenia,” said Alpert, who was not involved in the studio, for Fox News Digital.
“The hand is just one of many factors that can be associated with neurological traits, and you should interpret the findings with caution to avoid unnecessary alarm or stigma.”
Depression has not shown a significant difference in hand preference compared to control groups, the study showed. (East)
Alpert has called for more research to understand the relationship, if any, between dedication and mental health.
Packheiser’s chief author agreed that the results were “purely correlated”.
“We have no causal evidence that developing a psychiatric disorder associated tongue or neuro -development It causes a change in collapse or whether changes in tradition have caused any disorder, “Fox News Digital told Fox News.
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“Individuals from the general public should never be alarmed if their child prefers to use the left hand,” the researcher said.
“But in view of the rise mental disorders In the population, it is important to understand them better. “
