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 令枕三角 occipital triangle,又称肩胛舌骨肌斜方肌三 角,位于胸锁乳突肌后缘、斜方肌前缘与肩胛舌骨肌下 腹上缘之间。１. 境界 boundary ❖枕三角 occipital triangle，又称肩胛舌骨肌斜方肌三 角，位于胸锁乳突肌后缘、斜方肌前缘与肩胛舌骨肌下 腹上缘之间