attached_to cranium muscle prementum tentorio-labial muscle anterior tentorio-premental muscle HAO:0001064 The muscle that arises anteriorly from the cranium and inserts on the posterior margin of the prementum. adductor of the labium muscle 18 muscle 20 musculus tentorio-prementualis posterior adductor posterior adductor of the labium posterior labial adductor protractor of the labium ventral premental adductor