The Guardian:

In recent years, thanks to the invention of fMRI, we have made extraordinary breakthroughs in understanding the mental life of people trapped in the grey zone. We have discovered that 15% to 20% of people in the vegetative state, who are widely assumed to have no more awareness than a head of broccoli, are in fact fully conscious, even though they never respond to any form of external stimulation.

They may open their eyes, grunt and groan, and occasionally utter isolated words. They appear to live entirely in their own world, devoid of thoughts or feelings. Many really are as oblivious and incapable of thought as their doctors believe. But a sizeable number are experiencing something quite different: intact minds adrift deep within damaged bodies and brains. We have even figured out how to communicate directly with such people.

Wonderful yet utterly heartbreaking story.