Differentiation by dogs with ablated auditory cortex of signals modeling movement of a sound source.

1. Unilateral removal of the auditory areas of the cerebral cortex partially impairs the ability of dogs to differentiate the direction of movement of an auditory image and to distinguish it from a “stationary” image if the displacement and movement of the auditory image occur due to the introduction of interaural differences in stimulation time. The most substantial disturbances are observed if the auditory image moves or is displaced towards the hemisphere contralateral to that injured. 2. Bilateral ablation of the auditory cortex totally impairs the ability of animals to differentiate the direction of movement of an auditory image and to distinguish it from a “stationary” stimulus if its displacement or movement is due to interaural differences in stimulation time. Meanwhile, these animals retain the ability to localize the moving signal during change in interaural differences in stimulation intensity