Production of guinea pig vocalizations by electrical brain stimulation under anaesthesia

Four parts of the guinea pig brain were stimulated with tungsten electrodes under urethane anaesthesia to record sequences of vocalizations. These vocalizations were then compared with a series of templates of spontaneously produced vocalizations so that they could be identified as similar to the appropriate natural call. Each electrode position was stimulated a number of times at the same or different current levels and the identity and time of produced calls was recorded.