Scientists from America conducted a study that identified the differences in the structure of the brain of hearing and deaf person. Data about detected anomalies published scientific journal of Neuroscience.
It turned out that a lot depends on congenital deafness in humans, or if he acquired it under certain conditions in life. The most pronounced differences, scientists have discovered in the field, responsible for the perception of sounds (temporal cortex). In addition, when deafness is suffering the left hemisphere (it is responsible for the perception of language). For deaf people, specialists say, less pronounced amount of white matter.
As a result, people with congenital deafness, trained sign language, has a different structure and mechanisms of brain development than healthy people able to speak the native language.