Haeri Narges-Al-Sadat, Palizvan Mohammad Reza, Sadegh Mehdi, Aghaei Zohre, Rafiei Mohammad
Department of Physiology, Faculty of Medicine, Arak University of Medical Sciences, Arak, IR, Iran.
Department of Physiology, Faculty of Medicine, Arak University of Medical Sciences, Arak, IR, Iran.
Physiol Behav. 2016 Jul 1;161:47-52. doi: 10.1016/j.physbeh.2016.04.028. Epub 2016 Apr 17.
Epilepsy is a common neurological disease characterized by periodic seizures. Cognitive deficits and impairments in learning and memory are also associated with epilepsy. Neuronal changes and synaptic modifications in kindling model of epilepsy are similar to those occur during the learning procedure and memory formation. Herein we investigated whether seizure susceptibility in pentylenetetrazol (PTZ) model of kindling is predictable based on the learning ability in the Morris water maze (MWM) task in male and female rats. Allocentric learning was tested using MWM in present of light while egocentric learning was evaluated by MWM in dark room. The results indicated no significant differences in allocentric learning abilities between male and female rats. However, male rats were able to memorize the location of the platform more effectively compared to females in egocentric test. In addition, a statistically significant negative correlation between learning abilities (working memory) and seizure susceptibility in male rats was found while this correlation was positive in female rats. On the other hand, although there was no significant correlation between retrieval (reference memory) of spatial memories and seizure parameters in male rats, female rats showed a significant negative correlation. These findings may provide some evidences for prediction of seizure susceptibility according to learning ability and memory retention.
癫痫是一种常见的神经系统疾病,其特征为周期性发作。认知缺陷以及学习和记忆障碍也与癫痫有关。癫痫点燃模型中的神经元变化和突触修饰与学习过程和记忆形成期间发生的变化相似。在此,我们研究了基于雄性和雌性大鼠在莫里斯水迷宫(MWM)任务中的学习能力,戊四氮(PTZ)点燃模型中的癫痫发作易感性是否可预测。在有光条件下使用MWM测试大鼠的异中心学习能力,而在暗室中通过MWM评估大鼠的自我中心学习能力。结果表明,雄性和雌性大鼠在异中心学习能力方面没有显著差异。然而,在自我中心测试中,雄性大鼠比雌性大鼠更能有效地记住平台的位置。此外,发现雄性大鼠的学习能力(工作记忆)与癫痫发作易感性之间存在统计学上显著的负相关,而在雌性大鼠中这种相关性为正。另一方面,虽然雄性大鼠空间记忆的检索(参考记忆)与癫痫发作参数之间没有显著相关性,但雌性大鼠表现出显著的负相关。这些发现可能为根据学习能力和记忆保持来预测癫痫发作易感性提供一些证据。