Random Fact #48

80% of humans are left brain dominant for language.  This means that if an injury occurs on the right side of the brain, in which the language area is damaged, only 20% of people will be unable to speak.  There is also a language comprehension area that is located on the dominant side, at the back of the brain.  So potentially, the language are could be damaged but the comprehension area is fine (they have different blood supplies).  If this is the case the person will be able to understand what is said but be unable to communicate a response.