In another series of experiments further examining the lateralization of language in the left and right hemispheres, Sperry presented one object to the left visual field and a different object to the right visual field of the "split-brain" patients. The patient's left hand was put under a partition and then the patient was asked to draw with their left hand what they had been shown. The patients would draw what they had seen in their left visual field, but when asked what they had drawn would describe what had been shown to their right visual field. These tests proved that when the corpus callosum is severed, it breaks the connection between the left and right hemispheres, making them unable to communicate with each other. Not only are they unable to communicate with each other, but also without the corpus callosum connecting them one hemisphere has no idea that the other hemisphere even exists. There was even evidence of this outside the laboratory when some of the patients reported that, "while their left hand was unbuttoning their shirt, the right hand would follow along behind and button it again." These experiments were beneficial to numerous people in many different ways.