But recently Scott found a new voice. "Can everyone hear the PC? I apologize for the quality of the voice," he asked in writing.

Scott wrote these words, one letter at a time, with nothing but his thoughts and the help of what's called a brain computer interface or "BCI." He wears a cap that picks up the electrical activity of his brain and allows him to select letters simply by thinking about them. Then the computer turns his sentences into speech.

http://www.cbsnews.com/stories/2008/10/31/60minutes/main4560940.shtml check out this story . This is a good example of what is being accomplished with just the power of the brain.