Averaged synaptic weights modifications during learning.

<p>Learning induces an increment of synaptic modifications that reach a maximum value near trial 80 and then the amount of change in synaptic weights decrease. At trial 120, the rate of change predicts the experimental result found in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0008656#pone-0008656-g002" target="_blank">Figure 2A</a>. Error bars indicate the standard error to the mean. Shadow bars shows the experimental values of BDNF obtained in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0008656#pone-0008656-g002" target="_blank">Figure 2A</a>.