Brain death is said to occur if there is

(C) Absence of brainstem reflexes # BRAIN DEATH is present when there is irreversible loss of all brain function, both brain-stem function & cortical (hemisphere) function.> Brain death criteria - Loss of brainstem function & Absent cranial nerve reflexes - Pupillary light reflex; Corneal reflex; Oculoves-tibular reflex (cold caloric test; No gag reflex).> Absent respiratory brainstem reflexes is done by Apnea test: Loss of cortical function (No spontaneous movement; no response to external stimuli); Irreversibility.> Brain death is present when there is irreversible loss of brain function (criteria-loss of brainstem function) absent cranial nerve reflexes, pupillary light reflex, corneal reflex, oculovestibular reflex.