Student or Learner
For example, there is a documented medical phenomenon called "focal dystonia," which is an abnormal muscle function caused by extreme concentration. Somehow, when atheletes are concentrating too hard, they "short circuit" certain brain functions and miss the basket, don't hit the ball, or lose the race. In effect, they're letting their expectaions control them. So there's a physiological counterpart to what the mind manifests.
What is the meaning of the last sentence?