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. 2009 Jun 17;29(24):7803–7814. doi: 10.1523/JNEUROSCI.0030-09.2009

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Copyright © 2009 Society for Neuroscience 0270-6474/09/297803-12$15.00/0

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Figure 9. — SCs associate postsynaptic and presynaptic activity. A, In a representative experiment, membrane voltage (left), dendritic calcium transients (center), and relative synaptic strength before and after conditioning stimulation (right) are shown. Conditioning stimulation consisted of action potential trains (1 s, 100 Hz, top), PF bursts (5 stimuli, 50 Hz, middle), or PF bursts delivered in the middle of the action potential trains (bottom), with 7 trials averaged for each condition. The calculated sum of the calcium signal during the burst and train is superimposed on the measured calcium signal for combined stimulation (gray trace). Calcium elevation (B) and relative synaptic strength (C) are summarized (n = 6 neurons). Responses evoked by the PF burst alone and the action potential train paired with PF burst were significantly different (asterisk indicates p < 0.01, 1-way ANOVA).