牵开气管食管、食管,可以露出食管后的椎 前筋膜,椎前筋膜覆盖于椎体和颈长肌前, 与颈动静脉鞘相连,颈动静脉之间可见迷走 神经。
1 下领下腺submandibular gland 2 二腹肌后腹 posterior belly of d1gastric 1 下额下腺 submandibular gland 3 喉上神经 superior I aryngea I nerve1d 2 胸锁乳突肌 sternocle,domasto 4 舌动脉 I ingual artery jugular artery 3 颈内静脉 internal 5 颈外静脉 external 4 迷走神经 vagusjugular nerve vein 6 颈攀 ansa cervical 1s 5 颈攀 ansa cerv,calis 7 甲状腺上动脉 superior thyroid artery 6 颈总动脉common caroto1d artery 8 喉上动脉 superior laryngeal nerve 7 椎前筋膜prevertebral layer of cervical fascia 9 胸锁乳突肌 sternoc Iinferior e I domas toof id omohyoid 8 肩脚舌骨肌下腹 belly 10. 9 胸骨甲状肌 sternothyro1d muscle 胸骨甲状肌sternothyro,d 11 椎前筋膜(覆盖椎体 I prevertebral layer of cervical 10 胸骨舌骨肌sternohyoid fascia 12 胸骨舌骨肌sternohyo1d 13 颈总动脉common caroto1d artery 14 肩胛舌骨肌omohyo1d
颈阔肌属皮肌,是 一层较薄的肌 层,手术后须仔细缝合,以免形 成难看的瘢痕。