BAEP waves | Anatomic localization |
 I | Distal portion of the auditory nerve |
 II | Proximal portion of the auditory nerve or cochlear nuclear complex, in the upper part of the medulla, ipsilateral to the stimulation side |
 III | Cochlear nucleus or superior olivary complex in caudal pontine tegmentum, ipsilateral to the stimulation side |
 IV | Superior olivary complex (lateral lemniscus), contralateral to the stimulation side |
 V | Inferior colliculus located in the midbrain, contralateral to the stimulation side |
Blink test | Response |
 After stimulation of the supraorbital nerve, three responses are recorded on eyelid orbicular muscles: an early ipsilateral (R1) response and the two (ipsi- and contralateral) late responses (R2) | R1 response generated at the level of the pons, R2 responses at the level of the trigeminal-spinal tract at the pons level, the medulla oblongata, and the caudal trigeminal-spinal nucleus |