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- W1987196832 abstract "Field potentials of dentate granule cells in response to stimulation of the perforant path have been studied before and after injecting tetanus toxin (200 mouse LD50; or phosphate-buffered saline in controls) into the hilus of the dentate gyrus of rats under urethane anaesthesia. Within 1 h of toxin injection, the population spike, but not the slope of the excitatory postsynaptic potential, had increased markedly in amplitude and double or treble population spikes appeared in response to perforant path stimulation. Both paired pulse inhibition (15-ms interval between conditioning and test stimuli) and commissural inhibition (10-ms interval) were substantially reduced by the toxin. Neither multiple spikes nor the reduction in inhibition were seen in controls. Apparent inhibition of the excitatory postsynaptic potential, seen with paired stimuli to the perforant path, was not affected by the toxin. At later times after the injections, a progressive increase in the size of the spikes was seen in the controls while in the toxin animals there was often a secondary decrease in size. It is concluded that tetanus toxin can block both feed-back and feed-forward inhibitory components acting on dentate granule cells. The results are discussed with respect to the role of inhibitory processes in the control of epileptogenesis." @default.
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- W1987196832 date "1990-01-01" @default.
- W1987196832 modified "2023-10-14" @default.
- W1987196832 title "Tetanus toxin blocks inhibition of granule cells in the dentate gyrus of the urethane-anaesthetized rat" @default.
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- W1987196832 doi "https://doi.org/10.1016/0306-4522(90)90056-a" @default.
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