1.境界 boundary Parotid region SCM Digastric, posterior belly Submandibular triangle Digastric, anterior belly Occipital triangle Submental triangle Accessory n (CN XI Carotid triangle Superior belly of omohyoid Inferior belly of omohyoid Muscular trian Supraclavicular triangle 颈动脉三角 carotid triangle是由胸锁乳突肌、肩 胛舌骨肌上腹和二腹肌后腹围成。１. 境界 boundary 颈动脉三角 carotid triangle是由胸锁乳突肌、肩 胛舌骨肌上腹和二腹肌后腹围成