digastric branch of facial nerve digastric branch of facial nerve the digastric branch of facial nerve arises close to the stylomastoid foramen, and divides into several filaments, which supply the posterior belly of the digastricus; one of these filaments joins the glossopharyngeal nerve. digastric branch of facial nerveplan of the facial and intermediate nerves and their communication with other nerves. ("to digastric" labeled at bottom left.)detailsidentifierslatinramus digastricus nervi facialista98a14.2.01.105ta26298fma53288anatomical terms of neuroanatomy