【摘要】 目的:研究不同刺激模式的低频率电刺激对杏仁核电点燃癫痫模型大鼠的抗癫痫作用。方法:采用电点燃刺激法建立大鼠癫痫模型,观察开环模式(电点燃前给予)、闭环模式(电点燃后立即给予)以及不同形式闭环模式(全程给予、癫痫早期给予)的低频率电刺激对大鼠癫痫形成过程的影响。结果:闭环模式中全程给予低频率电刺激能降低大鼠电点燃癫痫形成过程中的癫痫发作等级(P<0.01)及缩短后放电持续时间(P<0.05)。闭环模式中癫痫形成早期给予低频率电刺激能降低大鼠电点燃癫痫形成过程中的癫痫发作等级(P<0.05),主要表现在对癫痫0~3级发展过程的抑制(均P<0.05)。而开环模式给予低频率电刺激不能抑制癫痫的发作(P>0.05)。结论:低频率电刺激的抗癫痫作用存在刺激模式依赖效应,这一结果可为深部脑刺激应用于临床治疗癫痫患者提供理论依据。更多还原

【Abstract】 Objective:To investigate the antiepileptic effects of various stimulation modes of low-frequency stimulation(LFS) on the kindling rats.Methods:Stimulating electrodes were implanted in the amygdala and current with constant intensity was applied to evoke kindling-induced seizures.The antiepileptic effect of LFS by open loop stimulation(before kindling),closed loop stimulation(immediately after kindling) and different forms of closed loop stimulation(whole stage after kindling and early stage after kindling) were investigated in amygdala kindled rats.Results:The closed loop LFS of whole stage after kindling can significantly inhibited seizure stages(P <0.01)and reduced afterdischarge duration(P < 0.05).The closed loop LFS of early stage after kindling can significantly suppress the seizure stages,mainly in stages 0-3(P <0.05 or P <0.01).The open loop low-frequency stimulation did not inhibit the seizure stage during kindling acquisition(P > 0.05).Conclusion:The antiepileptic effect of low frequency stimulation may have a mode-dependent effect.It may be helpful for the deep brain stimulation as a promising approach applied to clinical antiepileptic therapy in the future.更多还原