How the brain processes sign language. Over 70 million deaf people use sign languages as their preferred communication form. Although they access similar brain structures as spoken languages, it hasn't been identified the brain regions that process both forms of language equally. Scientists have now discovered that Broca's area in the left hemisphere, central for spoken languages, is also crucial for sign languages. This is where the grammar and meaning are processed, regardless of whether it is spoken or signed language. Source 8e.
Depending on whether people use language in the form of signs, sounds, or writing, it works in conjunction 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.