A side, sliced and top-view of four points in the brain: Blue shows the areas that are more active during the familiar condition and red those areas that are more active during the unfamiliar condition.

<p>Center of gravity coordinates (MNI reference system) are shown below each slice. The left picture shows the side view of the brain (s indicates the top of the brain, I the bottom, p the back, and a the front). The middle picture shows a sliced view of the brain (r denotes the rights side of the brain, l the left side). The right picture shows a top view of the brain. For more brain slices: see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0042929#pone.0042929.s001" target="_blank">Appendix S1</a>.</p>