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  • Title: Two types of EEG spikes in the kindled rabbit hippocampus.
    Author: Kogure S.
    Journal: Jpn J Psychiatry Neurol; 1990 Jun; 44(2):303-7. PubMed ID: 2259015.
    Abstract:
    The characteristics of interictal EEG spikes were studied in the rabbit hippocampus. After kindling for 2-4 weeks, rabbits were anesthetized and curarized for acute experiments. There were two types of EEG spikes in the kindled hippocampus; one (B) had its source in the stimulated side, and the other (A) in the contralateral side. In addition, compound EEG spikes (C) were observed that consisted basically of B and A spikes. Intracellular counterparts of A and B spikes were generally a depolarization-hyperpolarization sequence in the CA1 pyramidal cells. On the other hand, counterparts of the C spikes were initial depolarization with a superposed spike burst followed by relatively shorter lasting hyperpolarization which seemed to indicate an enhancement of excitation during the kindling process.
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