[Role of auditory regions of the cerebral cortex in localizing stationary sound sources in the dog].

The role of the auditory cortex in the localization of stationary sources was deduced from the deficit of localization ability of decorticated dogs. The lateralization threshold for stimulation by signals with interaural difference in time (delta T) and intensity (delta I) was taken as a quantitative estimate of the localization ability. These thresholds were determined for intact animals as well as for those with uni- and bilateral removal of the auditory cortex (AI, AII, Ep). The bilateral ablation has been found to disturb the temporal cue localization, whereas the delta I-cue localization has been retained. The ability of localization by the temporal cue depended on damage size (AI). The obtained data imply the importance of the auditory cortex for perception of temporal signal characteristics.