Neurologists have also started finding ways to communicate with patients previously believed to be in a vegetative state. It has to do with asking the patient to think about something (such as imagining clenching their muscles) for “yes” and to think about something that would light up a different part of the brain for “no.” They’ve used double-blind questions to show the patients can communicate. (The families give the answers to questions on a questionaire, but the researchers doing the testing do not know what the correct answers are for any given patient that they’re testing.)
Patients asked whether they would like to keep living answer in the affirmative. That will complicate the question of pulling the plug.
Just to clarify: This did not work with every patient tested, but only about (I think) 10-15% of them.