Table 1 FOUR score [19] with permission
Eye response | Â |
 4 | Eyelids open or opened, tracking, or blinking to command |
 3 | Eyelids open but not tracking |
 2 | Eyelids closed but open to loud voice |
 1 | Eyelids closed but open to pain |
 0 | Eyelids remain closed with pain |
Motor response | Â |
 4 | Thumbs-up, fist, or peace sign |
 3 | Localizing to pain |
 2 | Flexion response to pain |
 1 | Extension response to pain |
 0 | No response to pain or generalized myoclonus status |
Brainstem reflexes | Â |
 4 | Pupil and corneal reflexes present |
 3 | One pupil wide and fixed |
 2 | Pupil or corneal reflexes absent |
 1 | Pupil and corneal reflexes absent |
 0 | Absent pupil, corneal, and cough reflex |
Respiration | Â |
 4 | Not intubated, regular breathing pattern |
 3 | Not intubated, Cheyne–Stokes breathing pattern |
 2 | Not intubated, irregular breathing |
 1 | Breathes above ventilator rate |
 0 | Breathes at ventilator rate or apnea |