We've all heard of the left and right hemisphere of our brain. Each of these two hemispheres receive half the Visual information, and they control our movements separately – the left hemisphere controls the right side of the body, the right hemisphere and the left.

These two hemispheres communicate through a 'cable', or a series of nerves. However, this cable may be cut off, and several years ago, This process was conducted as a treatment for epilepsy. This separation can cause to a man some very strange problems. The CGP Grey our explains this very interesting video.