15 上肢藉下列何者附著於軀幹？

肩鎖關節（acromioclavicular joint） 盂肱關節（glenohumeral joint）

胸鎖關節（sternoclavicular joint） 柄胸關節（manubriosternal joint）

C

17 旋股內側動脈（medial circumflex femoral artery）穿過下列何者，至大腿後面？

髂腰肌（iliopsoas）和恥骨肌（pectineus） 恥骨肌和內收短肌（adductor brevis）

內收短肌和內收長肌（adductor longus） 內收長肌和內收大肌（adductor magnus）

A

23 下列有關迷走神經（vagus nerve）之敘述，何者錯誤？

喉外神經（external laryngeal nerve）控制肌肉造成聲襞（vocal folds）緊繃

其分枝形成頸襻（ansa cervicalis）之下根（inferior root）

其分枝喉返神經（recurrent laryngeal nerve）控制喉內肌肉

迷走神經於鎖骨下動脈（subclavian artery）前方跨越

B

The ansa cervicalis (or ansa hypoglossi in older literature) is a loop of nerves that are part of the cervical plexus. It lies superficial to the internal jugular vein in the carotid sheath.

Branches from the ansa cervicalis innervate three of the four infrahyoid muscles, including the sternohyoid muscle, the sternothyroid muscle, and the omohyoid muscle.

The external laryngeal nerve is the smaller, external branch (ramus externus) of the superior laryngeal nerve. It descends on the larynx, beneath the sternothyroid muscle, to supply the cricothyroid muscle.

It functions to tense the vocal cords by activating the cricothyroid muscle, increasing pitch.