男，30岁。右前臂尺侧切割伤，右手呈爪状畸形，诊断尺神经损伤。在有关尺神经损伤诊断治疗的描述中，错误的是（）
A.肘上部尺神经损伤者较肘下部损伤者爪状畸形重
B.拇指示指夹纸试验时需注意检查方法，有时因拇深屈肌腱的影响可出现阴性检查结果
C.尺神经中感觉与运动纤维相当，缝合时尤需准确对位，不可有旋转
D.为了获得足够长度以利吻合，可将尺神经移至肘前
E.若神经吻合后功能恢复不佳，可将中指及环指指浅屈肌腱转移重建骨间肌与蚓状肌功能
参考答案：A
解析：肘上部尺神经受损者，由于环指及小指的指深屈肌同时瘫痪，指间关节不呈屈曲状，不能表现为典型的爪状。而在肘下部损伤者，指深屈肌尺侧半的功能正常，小指及环指呈现为掌指关节过伸，指间关节屈曲，不能在屈掌指关节同时伸指间关节而呈典型的爪状，故A错误。
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| Two friends are having a picnic together. 1 names are Jack and Tim. Tim is very lazy (懒的). 2 the first evening of their holiday, Jack says to Tim, "Here's some money. Go and buy some meat." "I'm too tired," 3 Tim, "You go." So Jack goes to the market and pays ＄10 4 the meat. 5 he comes back, he says to Tim, "Here's the meat now, please cook it." But Tim answers, "No, I'm not good at 6 , you do it," So Jack cooks it, 7 he says to Tim, "Go and 8 some water." "No, I don't want to get my clothes dirty," Tim answers. 9 Jack says, "The meal is ready, come and eat it." "Yes, I'll do that," answers Tim, "I don't like 10 'No' all the time." | ||||
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