Questions 41-45 The idea that the left brain is cognitively different from the right is well substantiated, but the idea that those differences are dramatic is not, except for speech, which is only on the left side in almost all people. The right side does have language functions and seems to add 41 to speech, but in isolation, the right brain cannot speak. In the intact person, the mind of the right brain should be able to use the corpus callosum and 42 the speech center in the left brain for its own use, so the right mind in intact individuals is probably very articulate. This may seem strange, but if the right brain wants to move the right hand, whose control center is located only in the left hemisphere, it could 43 accomplish the movement. For instance, someone who had an injury to his left frontal lobe 44 whose motor (movement) cortex was intact would not be paralyzed, and his right brain would control most voluntary movement on both sides. We shouldn’t be too surprised that the left brain of a patient (who had his split-brain operation for epilepsy when he was 13) does not seem overly logical and analytical, because this attribute of the left brain refers to rather subtle comparisons with the right brain. Still, there is some merit to the idea that each hemisphere has a degree of advantage at some cognitive tasks. 45 , when the patient returned to his high school after surgery, where he was a very good student, he had to drop geometry because he couldn’t grasp the spatial concepts with his isolated left brain.