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Variations of the infrahyoid muscles. (A) Photograph of variations of the infrahyoid muscles. (B) Sschematic drawing of these variations. sOM, superior omohyoid muscle; iOM, inferior omohyoid muscle; SH, sternohyoid muscle; TG, thyroid gland; asterisk. *levator glandulae thyroideae muscle; arrow head, ansa cervicalis. arrow, inferior thyroid vein.
