Complex sentence: Research shows that gestures and all nonverbal communication activate Brodmann area 44 and 45, responsible for language (Broca's area) as sign language not only activates the right hemisphere of the brain responsible for gestures, but also the left hemisphere, responsible for language.
Split into simpler sentences: Research shows that gestures and all nonverbal communication activate Brodmann area 44 and 45, responsible for language (Broca's area). Sign language not only activates the right hemisphere of the brain responsible for gestures, but also the left hemisphere, responsible for language.