目的研究电刺激对坐骨神经干兴奋性的影响。
Objective To observe the effect of electric stimulation on the excitability of sciatic nerve trunk in vitro.
此外，DS能降低蟾蜍坐骨神经干动作电位的振幅，提示它对钠通道有阻断作用。
Furthermore, ds can obviously inhibit the action potential amplitude of isolated sciatic nerves in toads, indicating that it can block sodium channels.
结果对照组，注射侧坐骨神经干的125碘放射性强度是其它组织的30倍以上。
Results the intensity of radioactivity of 125iodine in the sciatic nerve of the injection side in the control group was 30 times of that in other tissues.
此外，本实验发现坐骨神经干的不同分支脱髓鞘程度不同，并提出此变化与病鸡是否表现卷趾麻痹密切相关。
The results also showed that degree of demyelination of branches of sciatic nerve were different and possibly associated with curled toe paralysis or no curled toe paralysis.
方法：记录蟾蜍坐骨神经干动作电位和腓肠肌收缩曲线，测定低位运动中枢、神经肌接头、骨骼肌出现疲劳的时间并加以比较。
Methods: By recording the action potential of sciatic trunk and contract curve of sural muscle of hoptoad, and measuring the time of fatigue in nerve centre, neuro-muscular junction and muscle.
方法：记录蟾蜍坐骨神经干动作电位和腓肠肌收缩曲线，测定低位运动中枢、神经-肌接头和骨骼肌出现疲劳的时间并加以比较。
Methods: By recording the action potential of sciatic trunk and contract curve of sural muscle of hoptoad, and checking the time of fatigue in nerve center, neuro-muscular junction and muscle.
方法记录蟾蜍坐骨神经干动作电位和腓肠肌收缩曲线，测定低位运动中枢、神经-肌肉接头和骨骼肌出现疲劳的时间并加以比较。
Methods: the action potential of sciatic trunk and contract curve of sural muscle of hoptoad were recorded, and the time of fatigue in nerve center, neuro-muscular junction and muscle was checked.
方法用不同的电刺激参数刺激坐骨神经干，测定引起的动作电位的幅度和传导速度分别衰减20%以及潜伏期延长20%时所需的时间。
The time required was investigated for the action potential to reduce its conduction velocity by 20% and to extend the latent period by 20% respectively.
牛蛙坐骨神经滴加龙血竭后，神经干动作电位幅值明显下降，不应期延长，传导速度减慢。
In the presence of Dragon's Blood, the action potential amplitude of the bullfrog sciatic nerve was decreased, the conduction velocity was slowered and the refractory period was delayed.
牛蛙坐骨神经滴加龙血竭后，神经干动作电位幅值明显下降，不应期延长，传导速度减慢。
In the presence of Dragon's Blood, the action potential amplitude of the bullfrog sciatic nerve was decreased, the conduction velocity was slowered and the refractory period was delayed.
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