【单选题】【消耗次数：1】
在中脑上、下丘之间切断脑干的动物将出现（ ）
①
肢体麻痹
②
去大脑僵直
③
脊休克
④
腱反射加强
参考答案：
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脊休克射消失的原因是（）
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离断的脊髓突然失去了高位中枢的调节
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脊髓中的反射中枢被破坏
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切断损伤的刺激对脊髓的抑制作用
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缺血导致脊髓功能减退
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失去了脑干网状结构易化区的始动作用
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横断脊髓时大量出血
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断面以下脊髓丧失高位中枢的调节
⑤
失去了脑干网状结构易化区的始动作用
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