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Electrical Kindling is one of the most popular epileptic model techniques that cause seizures such as temporal lobe epilepsy. So far, various therapies have been used to treatment of epilepsy. Among these treatments, low-frequency stimulation (LFS) has been widely considered for improving effect on drug-resistant epilepsy, but its mechanism is not well understood. Since calcium entering to the cytoplasm and increasing its concentration is one of the reasons for seizure, metabotropic glutamate receptor (mGluR1), dopamine receptor (D1) and ADPR cyclase (CD38), which increased calcium in the cytoplasm from different pathways, were selected. With this aim that by examining the change in the expression of these genes, we help to clarify the LFS improvement effect.  In this study, the hippocampus of rats was used and the changes in genes expression were investigated using real-time PCR technique. The results showed that the expression of all selected genes  increased significantly after kindling and then after the LFS the expression of all was returned to sham value. Hence, one of the ways in which LFS interferes may be related to the pathway for calcium entering to the cytoplasm.

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In epilepsy as a chronic neurological disease, there are significant alterations in the brain network which results in abnormal brain activity. Understanding the exact changes in brain rhythms may help the investigators to find the brain networks activity in health and disease more precisely. In this article, at first we reviewed the findings from recent animal and clinical studies showing that brain rhythms are affected in the epileptic brain. Then, some documents demonstrating the compensative effect of DBS on these oscillations will be discussed. In this article we reviewed the studies in field of epilepsy and brain rhythms. For this purpose we searched the duciments by scientific serach engeens including PubMed, ScienceDirect and Google Scholar. The electrophysiological studies have indicated significant changes in delta (1–4 Hz), theta (4-7 Hz), alpha (8-12 Hz), beta (13–30 Hz), and gamma (30–80 Hz) oscilations in the epileptic brain. Recently, deep brain stimulation (DBS) has been suggested as a potential and efficient treatment for pharmacoresistant epileptic seizures. The exact mechanism of DBS action is unclear, but some studies demonstrate that one of its probable mechanisms is modulating neural network activity. It seems that the probable compensative alteration in brain rhythms may be considered as a mechanism of DBS anticonvulsant action.
 

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Deep brain stimulation (DBS) stands as an alternative treatment for drug-resistant temporal lobe epilepsies. In this study, we investigated the effects of both low- and high-frequency stimulation (LFS and HFS) of the olfactory bulb on locomotor activity and preferences for spending time in the central or border regions. Rats underwent a kindling procedure involving semi-rapid electrical stimulation (6 stimulations per day) of the hippocampal CA1 region. Fully kindled animals received LFS (1 Hz) or HFS (130 Hz) at four time points: 5 min, 6 h, 24 h, and 30 h after the last kindling stimulation. Subsequently, rats were placed in the open field chamber and allowed free, uninterrupted movement within the respective quadrant of the maze for a single 10-minute period. During this time, tracking software recorded movement, and locomotor activity as well as preferences for spending time in the central or border regions were evaluated. Overall, applying DBS in the olfactory bulb at both low and high frequencies decreased exploration time in the center and increased exploration time in the border for the rats. Furthermore, a higher intensity of HFS was more effective than a lower intensity of HFS in reducing anxiety or altering locomotor behavior. According to the results of the present study it may be suggested that applying DBS affects some aspects of the animals’ activity and therefore, the activity monitoring tests have to be done following DBS application.