No spontaneous movement in response to any stimuli
No spontaneous respirations for at least one hour
Total lack of responsiveness to even the most painful stimuli
No eye movements blinking, or pupil responses
No postural activity, swallowing, yawning, or vocalizing
No motor reflexes
A flat electroencephalogram (EEG) for at least 10 minutes
No change in any of these criteria when they are tested again 24 hours later
The lack of brain activity must prevail both in the brainstem and in the cortex