brain sciences Article Amygdala Low-Frequency Stimulation Reduces Pathological Phase-Amplitude Coupling in the Pilocarpine Model of Epilepsy István Mihály 1,* ,Károly Orbán-Kis 1 , Zsolt Gáll 2 , Ádám-József Berki 1, Réka-Barbara Bod 1 and Tibor Szilágyi 1 1 Department of Physiology, Faculty of Medicine, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mures, , 540142 Târgu Mures, , Romania;
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[email protected] (T.S.) 2 Department of Pharmacology and Clinical Pharmacy, George Emil Palade University of Medicine, Pharmacy, Science, and Technology of Târgu Mures, , 540142 Târgu Mures, , Romania;
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[email protected]; Tel.: +40-749-768-257 Received: 15 October 2020; Accepted: 11 November 2020; Published: 13 November 2020 Abstract: Temporal-lobe epilepsy (TLE) is the most common type of drug-resistant epilepsy and warrants the development of new therapies, such as deep-brain stimulation (DBS). DBS was applied to different brain regions for patients with epilepsy; however, the mechanisms of action are not fully understood. Therefore, we tried to characterize the effect of amygdala DBS on hippocampal electrical activity in the lithium-pilocarpine model in male Wistar rats. After status epilepticus (SE) induction, seizure patterns were determined based on continuous video recordings. Recording electrodes were inserted in the left and right hippocampus and a stimulating electrode in the left basolateral amygdala of both Pilo and age-matched control rats 10 weeks after SE. Daily stimulation protocol consisted of 4 50 s stimulation trains (4-Hz, regular interpulse interval) for 10 days.