... function is documented by the absence of a response to corneal stimulation and the absence of inducible eye movements: no eye movement toward the side of irrigation of the tympanic membrane with ... oculovestibular testing. Cessation of medullary function is documented by the apnea test: no ventilatory movements in the setting of maximum CO2 stimulation. The test is performed by disconnecting the ... agitation, and abnormal mental phenomena, such as illusions, dellusions, and hallucination. (delirium and stupor may alternate in the same patient).- COMA-LIKE STATES: Locked-in Syndrome, Psychogenic...