Changes in frequency domain across the time course of learning.

<p>Power Density Spectrum (A) and Mean Power frequency (B) computed from the time series of the unit normal vector along AP and ML directions. Symbols unit in A and abbreviations as in Figs <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0142423#pone.0142423.g002" target="_blank">2</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0142423#pone.0142423.g003" target="_blank">3</a>.