Sniff-Like Patterned Input Results in Long-Term Plasticity at the Rat Olfactory Bulb Mitral and Tufted Cell to Granule Cell Synapse

Figure 6

Plasticity induction relies on changes in . Population quantal analysis of the synaptic connections from the SBS experiments. (a) The numbers of release sites were strongly correlated with the synaptic efficacy at both the control (, ) and long-term (, ) measurement phases. The dotted line represents the linear relation between and EPSP amplitude (see (1) in Section 2) for the averaged quantal size )/2 = 0.80 mV and the averaged release probability resulting from the quantal analysis: . (c) Scatterplot of the relative change in the number of release sites versus the observed relative plasticity. There is a strong correlation (, ). (b, d) In contrast, the quantal sizes and the relative change in their sizes were not correlated with the synaptic efficacies and the observed relative plasticity.