Can a headband read the minds of coma patients?

This observational study tests whether a lightweight headband using near-infrared light can measure brain activity in healthy adults and in people with disorders of consciousness like coma or minimally conscious state in the ICU. Participants wear the headband while receiving gentle touch, listening to sounds, or imagining moving. The study does not provide treatment but aims to see if this tool can safely detect brain responses, potentially helping future research on assessing awareness after severe brain injury.