Open field activity after learning in mice

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Abstract
The possible increase of open field activity after learning in mice was examined in five experiments, where the following factors were assessed: (1) and (2) the duration of an open field activity increase (3) the influence of the familiarity of the environment (4) the influence of floor texture during activity measurements and (5) the result of motor activation per se compared to the result of learning. The results indicate that the activity increase lasted 60 min. The phenomenon was related to the learning paradigm used and to the familiarity of the environment and was affected by floor texture. Motor activation per se did not activate the mice as much as the learning of a task. It is suggested that an open field activity increase in mice after learning is associated both with the strain due to the acquisition of a new response and with the strain due to the activity measurement.