β-Adrenergic Receptor Activation Modulates the Induction of Complex Spike-Dependent LTP by Regulating Multiple Forms of Heterosynaptic Plasticity.

Moreover, although 5 s of S1 TPS induced a modest heterosynaptic facilitation of EPSP‐evoked CS bursting at S2 synapses in control experiments ( P CSB = 0.29) (Figure 8D ), EPSP‐evoked CS bursting during S2 TPS was enhanced when S1 and S2 TPS trains were delivered in the presence of ISO ( P CSB = 0.65), although this effect was marginally significant ( p = 0.049) (Figure 8E ).

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Consistent with the notion that LTP induction at S2 synapses is enabled by the heterosynaptic facilitation of EPSP‐evoked CS bursting produced by S1 TPS, there was a highly significant correlation between the magnitude of LTP at S2 synapses and the probability of EPSP‐evoked CS bursting during S2 TPS (Figure 10F ).

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