Left Brain - Left Side?

The two cerebral hemispheres of the brain are virtual mirror images of each other, but their functions are, in fact, very different. The basic difference between the two is that the right hemisphere controls the left side of the body, and the left hemisphere controls the right side of the body. The crossover of nerve pathways inside the medulla oblongata is readily observable (if your job is looking into people's heads). Although it is possible to chart many specific brain functions (which side of the brain contains intelligence and where is the elusive spark of creativity to be found?), the answers are not easy to come by. One of the main reasons it is difficult to find answers to these questions is that the highest human qualities are difficult to measure and almost impossible to define.