Researchers at Max Planck Institute for Human Cognitive and Brain Sciences now want to find out which areas of brain are actually involved in sign language processing across various studies, and how much overlap is with brain regions that hearing people use to process heard language.
In a metastudy recently published in journal Human Brain Map, y collected data from sign language experiments conducted around world.
The researchers found that specifically socalled “Broca” area in front of brain in left hemisphere is one of regions involved in sign language processing in nearly every study evaluated.
This region has long been known to play a central role in spoken language as it is used for grammar and meaning.
In order to better classify ir findings from current metastudy, scientists compared ir findings to a database containing several thousand brainscanning studies, according to what was reported by “Science Daily” website about study.
The results confirm that Broca’s area in left hemisphere of brain is a central node in language network of human brain. And depending on wher people use language in form of signs, sounds, or writing, it works with or networks.
Consequently, Broca does not only process spoken or written language, as it was known until today, but also abstract linguistic information in any form of language in general.
“Accordingly, brain is specialized in language per se, not speaking,” explains Patrick C. Trettenbrain, first author of study and a PhD student at Max Planck Institute.