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Short-term facilitation. A, Example of frequency-dependent short-term facilitation of the maximal evoked response for mutant and control animals. The traces show synaptic facilitation observed with a 3 pulse train of 20 Hz stimulation recorded in 0.75 mm calcium and represents the average of five individual traces. B, Summary of facilitation ratios (third pulse amplitude/first pulse amplitude × 100) observed from six mutant and nine control cells. There is no significant difference.
