One person in a vegetative state answered yes/no questions by imagining different types of movement.

Question

Quizplus · Accepted Answer

This is true. Researchers have found that some individuals in a vegetative state or with severe brain injuries can answer yes/no questions by imagining different types of movements, such as playing tennis or walking around their house. These imagined movements can be detected via brain scanning technology and translated into responses to questions. This technique is known as a "neuroimaging-based communication" and has been used successfully in a few cases, though it is not yet widely available or reliable.

One Person in a Vegetative State Answered Yes/no Questions by Imagining