View larger image | Awareness typically tracks with wakefulness — especially in normal states of consciousness (bold). People in coma or under general anesthesia score low on both measures, appearing asleep with no signs of awareness. Sometimes, wakefulness and awareness become uncoupled, such as among people in a persistent vegetative state. In this case, a person seems awake and is sometimes able to move but is unaware of the surroundings. Credit: Stanford Univ.