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【多选题】
A 17-year-old boy was seen in the emergency department after receiving a stab wound at the front of the neck. The knife entrance wound was located on the left side of the neck just lateral to the tip of the greater cornu of the hyoid bone. During the physical examination the patient was asked to protrude his tongue, which deviated to the left. The following statements would explain the physical signs in this patientA.
The genioglossus muscles are responsible for protruding the tongue and the point of the knife blade severed the left hypoglossal nerve
B.
Paralysis of the left genioglossus muscle permitted the right genioglossus to pull the tongue forward and turned the tip to the left side
C.
The hypoglossal nerve descends in the neck between the internal carotid artery and the internal jugular vein
D.
At about the level of the tip of the greater cornu of the hyoid bone the hypoglossal nerve turns forward and crosses the internal and external carotid arteries and the lingual artery to enter the tongue
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】闭合导线指的是( )。
A.
起止于同一已知点，形成一多边形，并有一已知方向的单一导线
B.
起止于两个已知点，并且起点和终点各有一已知方向的单一导线
C.
从一个已知点和已知方向出发，既不附合到另一已知点，也不附合到起始已知点的单一导线
D.
有多个已知点和已知方向，形成网状图形的导线