Pórszász J, Gibiszer K P
Acta Physiol Acad Sci Hung. 1975;46(2):141-50.
i) In the awake animal, neither a late response nor a silent period could be evoked from the tibial nerve. Somatic afferentation with impulse trains failed to inhibit efferent sympathetic activity. On the other hand, vagal afferentation had an inhibitory action also in the awake animal. In the awake animal, the excitatory processes are dominant. ii) Urethan anaesthesia did not influence the sympathetic nervous processes; the reflex response were practically the same as in the awake animal. iii) Chloralose anaesthesia altered the sympathetic reflex observable in the awake animal. Somatic afferentation of low threshold voltage already elicited a late response and a silent period; in addition, a high degree of summation ability of silent periods was apparent. Thus, chloralose anaesthesia seems to raise the excitatory level of the sympathetic centres in the direction of inhibition. iv) Combined chloralose+urethan anaesthesia, under which investigations are usually performed, was seem to affect the reactivity of the sympathetic centres in the same way as did chloralose anaesthesia.
i) 在清醒动物中，无法从胫神经诱发迟发反应或静息期。用冲动序列进行躯体传入不能抑制传出交感神经活动。另一方面，迷走神经传入在清醒动物中也具有抑制作用。在清醒动物中，兴奋过程占主导。ii) 乌拉坦麻醉不影响交感神经过程；反射反应与清醒动物几乎相同。iii) 氯醛糖麻醉改变了清醒动物中可观察到的交感神经反射。低阈值电压的躯体传入已诱发迟发反应和静息期；此外，静息期的高度总和能力很明显。因此，氯醛糖麻醉似乎朝着抑制方向提高了交感神经中枢的兴奋水平。iv) 通常在其下进行研究的氯醛糖+乌拉坦联合麻醉，似乎与氯醛糖麻醉一样影响交感神经中枢的反应性。
