Functional neuroanatomy of language without speech: An ALE meta-analysis of sign language.Sign language (SL) conveys linguistic information using gestures instead of sounds.  (c) SL-specific voxels in Broca's area are also crucially involved in SWL, as confirmed by meta-analytic connectivity modeling using an independent large-scale neuroimaging database. 
ALE
Functional neuroanatomy of language without speech: An ALE meta-analysis of sign language.Sign language (SL) conveys linguistic information using gestures instead of sounds.  (c) SL-specific voxels in Broca's area are also crucially involved in SWL, as confirmed by meta-analytic connectivity modeling using an independent large-scale neuroimaging database. 
ALE