Fig. 15.

Motivation and avoidance behavior. Motivation was tested in non-perturbed sessions by calculating the percentage of trials per session in which the mice properly used the light stimulus to leave the shelter box and started to walk on the ladder. The same responses measured during unpleasant circumstances (perturbed sessions) were used to test avoidance behavior. a–d (light) The occurrence of responses to light during non-perturbed sessions was not significantly different for any of the cerebellar mutant mice from that in control mice. Moreover, the occurrence of mutant responses to light was also not significantly different from that of control mice during perturbed sessions. a–d (air) Similarly, the occurrence of responses to air stimuli in cerebellar mutant mice during non-perturbed sessions was not significantly different from that in control mice. The occurrence of responses to air was also not significantly different from that in control mice during perturbed sessions. Error bars represent SEM