Fainting linked to genetic factors: Study
Washington: It`s all in the family? According to a new research, fainting has a strong genetic predisposition.
Researchers from American Academy of Neurology found that fainting has a strong genetic component and it could be inherited but not usually by a single gene.
Fainting, also called vasovagal syncope, is a brief loss of consciousness when your body reacts to certain triggers, such as emotional distress or the sight of blood.
"The question of whether fainting is caused by genetic factors, environmental factors or a mixture of both has been the subject of debate," said study author Samuel F Berkovic from the University of Melbourne in Victoria, Australia, and a member of the American Academy of Neurology.
"Our results suggest that while fainting appears to have a strong genetic component, there may be multiple genes and multiple environmental factors that influence the phenomenon," Berkovic said in a statement.
For the study, 51 sets of twins of the same gender between the ages of nine and 69 were given a telephone questionnaire. At least one of the twins had a history of fainting.
Researchers also gathered information about any family history of fainting. Of the 51 sets of twins, 57 per cent reported having typical fainting triggers.
The research found that among twins where one fainted, those who were identical (from the same fertilised egg) were nearly twice as likely to both faint compared to fraternal twins (those from two different fertilised eggs).
The risk of fainting not related to outside factors (such as dehydration) was also much higher in identical twins compared to fraternal twins.
Identical twins were much more likely to both experiences fainting associated with typical triggers than fraternal twins. The frequency of fainting in non-twin relatives was low, suggesting that the way fainting is inherited is usually not by a single gene.
The study was published in the journal Neurology.
More from India
More from World
More from Sports
More from Entertaiment
- Dengue cases on the rise in Delhi - Is the govt waiting for another epidemic?
- JNU student accuses fellow PhD scholar and AISA member of rape
- Sukhoi 30MKI posted in Arunachal Pradesh; Kiren Rijiju lauds development
- Olympic medalist PV Sindhu returns to Hyderabad; receives grand welcome
- Twelve-year-old ISIS suicide bomber caught and arrested in Iraq
- Rio Olympics bid farewell as athletes sign-off with a colorful closing ceremony
- Athletes’ Report Card: See how the Indian athletes performed at the 2016 Olympic Games
- Over 400 flights grounded as Tokyo prepares to take a direct hit from typhoon
- Kamal Haasan to be conferred French award
- New laser created from jellyfish proteins