Electrical stimulation in cats of regions in and related to the anterior part of the hypothalamus can induce the behavior of expelling or retaining urine and feces. When electrodes planted in these regions are stimulated by radio waves, the cat stops whatever it is doing and behaves as though it is going to urinate or defecate. It goes through its usual behavior of digging a hole, squatting, and assuming the correct posture, and then it passes urine or feces. At the end, it even goes through its customary ritual of hiding its excreta. The eating and drinking centers are in ...(100 of 37287 words)