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. 2009 Sep 10;20(5):1208–1216. doi: 10.1093/cercor/bhp185

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© 2009 The Authors

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 1. — Examples of PSTHs (A and B). PSTHs of the neuronal responses after tactile paired-pulse stimulation with different ISIs. Stimulus duration was 8 ms. The number of spikes/bin (bin width = 1 ms) is plotted against time. Arrows indicate onset of tactile stimulation. Additionally, the ratio calculated for the amplitudes of the second and first response peaks is shown for each single PSTH. (A) PSTHs of neuron responses recorded in a young animal. (B) PSTHs of neuron responses recorded in an old animal.