Positive signs of brain death or brain damage
+Unresponsiveness to all stimuli
+Pupillary responses are absent
+All brain functions cease
+No eye movements are noted when cold water is instilled into the ears (caloric test).
+No corneal reflex is present
+No gag reflex is present
+Quick rotation of the patient's head from left to right (doll's eyes test) causes the eyes to remain fixed, suggesting brain death.
+No response to painful stimuli is present
+An apnea test reveals no spontaneous breathing
+EEG shows no brain activity or response