The mind-brain problem is the issue of how the mind is related to the brain.
Three main views on this problem are:

• Dualism
  The mind (or soul) is something independent of the body
• Materialism
  The mind is nothing but a by-product of the biological processes taking place in a particular brain.
• Functionalism
  The mind is indeed realised in a brain, but it could be copied in any other brain.
  Just like information on a computer can be copied to other computers.