Do Brain Scans of Comatose Patients Reveal a Conscious State?: Scientific American: Patient 23 was only 24 years old when his life was devastated by a car accident. Alive but unresponsive, he had been languishing in what neurologists refer to as a vegetative state for five years, when a neuro-scientist and his colleagues put him into a functional magnetic resonance imaging (fMRI) machine and started asking him questions. Incredibly, he provided answers. A change in blood flow to certain parts of the man's injured brain convinced researchers that patient 23 was conscious and able to communicate. It was the first time that anyone had exchanged information with someone in a vegetative state.
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