Example from an individual animal, of behavioral responses elicited by stimulation of the middle of the tail.

<p>The distance D from this site to the entry zone in the cord was 115 mm and the stimulus (70-320 mJ) was applied from time 0 until the movement of the tail. The mean basal temperature T₀ was 24.7 (24.5-25.0)°C. <b>A. Temporal evolution of the temperature of the skin</b> (31 trials). Left graph: temporal evolution of the temperature of the skin T = f(t) recorded in the center of the heating spot. Right graph: Identical data expressed in terms of squared temperature variations. All these linear relationships were highly significant and their slopes α could therefore be computed confidently. Each individual trial was fully summarized by four measures, namely T₀, AT, t_R and α. These measures were used for building the black graphs in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0036699#pone-0036699-g004" target="_blank">Figure 4B-D</a>. <b>B. Changing the origin of time.</b> When one changes the origin to center the heating curves on the actual moment of the reaction, one can visualize the temporal evolution of the sequence of the preceding events either in terms of temperature (left graph) or square of temperature variation (right graph). Note the clear tendency of these curves to cross each other in a privileged zone (open white circle; see text).