外側裂周區 [ㄨㄞˋ ㄘㄜˋ ㄌㄧㄝˋ ㄓㄡ ㄑㄩ; wai4 ce4 lie4 zhou1 qu1] perisylvian (the part of the brain surrounding the lateral sulcus or Sylvian fissure), involved in speech ◄ ►