Researchers Claim Two Genes Triggering Brain Size and Higher IQ Levels Associated with Certain Risks
Scientists are claiming a strong link between brain size and volume of certain brain parts and higher IQ levels or risks of developing disorders like Alzheimerâ€™s disease too.
Since the last few years, researchers are trying to find out about the link that can reveal some big facts upon the size of the brain or its parts and the risks that certainly occur in the body and put the person at risks of suffering several brain disorders like autism or Alzheimerâ€™s.
From their recent findings, scientists are revealing about two new genes, which according to them, can also play a major role in determining the brain size as well as can also affect the IQ levels or can put a body at risks of developing brain disorders like Alzheimerâ€™s disease.
Studies have proved that an autistic child has a bigger-sized brain than the unaffected youngsters, whereas Alzheimerâ€™s patients usually suffer with smaller hippocampus i. e. the brain region responsible for memory.
Following similar evidences, researchers carried out study to learn about the influencing power behind the brain size. Doubting that a personâ€™s genes might be playing big role as a heritable factor, researchers suggested that genes could severely influence vulnerability to mental disorders due to brain size.
The researchers ran Enhancing Neuro Imaging Genetics through Meta-Analysis (ENIGMA) Consortium with the help of 200+ scientists from 100 different institutions worldwide. They started their study over several genes to learn about the ones featuring triggering features of brain size.
Combination of two powerful techniques helped them achieved their target i. e. genome-wide analyses of disease-related genetic variants and brain imaging.
After studying MRI scans of the brain structures of 21,000 people suffering both with disorders like depression, anxiety, Alzheimerâ€™s or without and comparing them with genetic survey details of the DNA changes, they found two genetic variants, one affecting the brain size and another affecting volume of hippocampus.