Language is more than speaking: How the brain processes sign language
Broca's area in the left hemisphere of the brain, the central hub for spoken languages, is also the crucial brain region for sign languages. This is where the grammar and meaning of language are processed, regardless of whether it is spoken or signed language. This shows that our brain is generally specialized in processing linguistic information. Whether this information is spoken or signed seems to be of secondary importance.
Broca's area in the left hemisphere is a central node in the language network of the human brain. Depending on whether people use language in the form of signs, sounds or writing, it works together with other networks. Broca's area thus processes not only spoken and written language, as has been known up to now, but also abstract linguistic information in any form of language in general. The brain is therefore specialized in language per se, not in speaking.
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