63 一位20 歲的年輕人發生車禍，造成肩胛骨翼狀外翻（scapular winging），下列敘述何者錯誤？

可能因背肩胛神經（dorsal scapular nerve）受損所致

大多為前鋸肌（serratus anterior muscle）無力所致

大多為肩胛下肌（subscapularis）無力所致

大多為長胸神經（long thoracic nerve）受損所致

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下列敘述何者錯誤？

OH MY GOODNESS!!!!!

Function: SERRATUS ANTERIOR

The serratus anterior is occasionally called the "big swing muscle" because it is largely responsible for the protraction of the scapula—that is, the pulling of the scapula forward and around the rib cage that occurs when someone throws a punch. The serratus anterior also helps to stabilize the scapula. In addition, it assists in rotating the scapula upward.

dorsal scapular nerve

It provides motor innervation to the rhomboid muscles, which pull the scapula towards the spine and levator scapulae muscle, which elevates the scapula.