Dissect the suprahyoid region Dissect the structures superficial to geniohyoid: cut the geniohyoid close to hyoid bone, reflect it anteriorly and expose the geniohyoid msearch for submandiburar duct and lingual n, from the ant border of deep part of submandibualr gland find the hypoglossal n close to inf border of post belly of digastric m 茎突舌肌 sus 茎突咽肌N stylopharyng glossopharyngeal n nrnsubmandibul submandibular submandibular 颏舌肌 genioglossus hyoglossus lingual a 颏舌骨肌 geniohyoid middle/ constrictor of phDissect the structures superficial to geniohyoid: cut the geniohyoid close to hyoid bone, reflect it anteriorly and expose the geniohyoid m.search for submandiburar duct and lingual n,from the ant.border of deep part of submandibualr gland.find the hypoglossal n.close to inf.border of post.belly of digastric m. Dissect the suprahyoid region