Note on reflex thresholds in the cat during spinal shock
Note on reflex thresholds in the cat during spinal shock
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DOI：
10.1152/ajplegacy.1935.111.2.263
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发表时间：
1935-03-01
影响因子：
--
通讯作者：
Stewart, WB
中科院分区：
文献类型：
--
作者：
McCouch, GP;Snape, WJ;Stewart, WB
二乙烯基醚的快速消除使其成为研究脊髓休克初始阶段横切术的合适麻醉剂;在成年猫中，以下短暂抑制涉及反射阈值，其严重程度按升序排列：（1）从大腿外侧引出的同侧伸展，很少或根本没有;（2）同侧屈曲，相对较少;（3）交叉屈曲，中度;（4）交叉延伸，严重。在这些反射中，前3个反射在横断后立即出现。交叉延伸可以在20分钟到24小时以上的任何时间间隔出现。其出现的晚可能部分是由于脊髓休克，部分是由于交叉屈曲反射的抑制。同样，同侧屈曲反射虽然受电击影响相对较小，但在横切后几天内，其感受野并没有有效地扩展到大腿外部参与程度更低的对抗反射的感受野。
Its rapid elimination makes divinyl ether a suitable anesthetic for transection for study of the initial phase of spinal shock; in the full grown cat the transient depression following involves the reflex thresholds in the ascending order of severity: (1) ipsilateral extension elicited from the external aspect of the thigh, little or not at all; (2) ipsilateral flexion, relatively little; (3) crossed flexion, moderately; (4) crossed extension, severely. Of these reflexes, the first 3 are present immediately after transection. Crossed extension may appear at any interval from 20 min. to more than 24 hrs. The lateness of its appearance is probably due partly to spinal shock, partly to inhibition from the crossed flexion reflex. Similarly, the ipsilateral flexion reflex, though relatively little affected by shock, does not extend its receptive field effectively over that of the still less involved antagonistic reflex from the external aspect of the thigh for several days after transection.