Experiments were performed to investigate evoked focal potentials in slices of rat olfactory cortex. The results showed that 1 microM corticotropin-releasing factor (CRF; corticoliberin) increases the frequency of posttetanic potentiation, which had a shorter delay phase than in control experiments. Posttetanic potentiation during perfusion with 0.1 microM corticoliberin had a longer delay phase than in control experiments.
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