Face blindness remains a mystery yet

Face blindness is a rare form of disease that where the patient can not distinguish face. Researchers are yet to find the reasons behind the disease. However, the disease may be of two types: acquired and inherited.

Cibu Thomas, a neuroscientist who led the study while at Carnegie Mellon University in Pittsburgh, Pennsylvania, said that people who develop the condition later in life are usually those who have suffered a stroke or an injury in a brain region important for facial recognition, called the fusiformgyrus.

However, the inherited form of the disease, according to researchers, is far more mysterious and affects up to one out of 50 people. Facial recognition tests can detect prosopagnosiacs, but functional brain scans found some differences between the brains of people with and without the disease.

It was found that the brains of prosopagnosiacs had less connections than controls in two tracts that run smack through the fusiform gyrus. But there were no such wiring differences in other parts of their brains.

In celebrity face recognition tests, for example where subjects were asked to identify a hairless Elvis Presley, the brain connections predicted the scores of people with prosopagnosia, as well as controls.Thus, Thomas deduced that prosopagnosia is a matter of degree.

Source: MD India


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