Effects of prefrontal lesions on left leg - right leg differentiation to nondirectional acoustic cues in dogs

Abstract

Twenty five dogs were trained preoperatively in left leg- right leg differentiation to nondirectional acoustic cues. Removal of the medial precruciate cortex as well as the proreal or orbital cortex together with underlying fibers did not affect performance of the task, whereas lesions which involved the fibers underlying the medial precruciate cortex produced more or less pronounced, yet moderate impairment. Comparison between impairment described in this paper and that obtained following similar lesions in earlier experiment with directional cues indicates that fibers underlying the medial precruciate cortex are of greater importance when directional cues are involved in task.