Fig. 4. Analysis of in vitro locomotor activity. Distribution histograms of the slopes for (A) BP1-BP5 and (B) 23, 34 and 15 versus cycle time (see Fig. 2B) recorded from animals (N=4-29 animals; see Table 1, right). As discussed for Fig. 3, use of the Sign test was valid to determine if the composite slopes of these locomotor activity parameters versus cycle time were significantly different than zero.