1 | Page
BAEP Questions and Correct Answers
BAEP Ans: brainstem auditory evoked potential far field
generated by the auditory pathway and is stimulated by sound
typically monitored during surgery within the posterior fossa
BAEP latencies Ans: wave I - 1.7
wave III - 3.9
wave V - 5.7
most important waves I and V
wave 1 generator Ans: distal VIII nerve (as it leave cochlea)
wave 2 generator Ans: proximal VIII nerve (as it enters brianstem)
wave 3 generator Ans: medulla in brainstem (cochlear
nucleus)(superior olivary complex)
wave 4 generator Ans: brainstem
wave 5 generator Ans: midbrain (lateral lemniscus)(inferior
colliculus)
changes in wave 1 Ans: consistent with auditory nerve
dysfunction
© 2025 All rights reserved
, 2 | Page
delay in wave 1-3 Ans: consistent with auditory nerve dysfunction
changes in wave 3-5 Ans: consistent with brainstem dysfunction
BAEP stimulus Ans: broad band clicks
recommended BAEP stim intensity Ans: 60-70 dB HL
100 dB SPL
BAEP stimulus delivery Ans: delivered one ear at a time. ipsilateral
ear to surgery monitored continuously. contralateral ear
stimulated at intervals to check for developing asymmetry, latency
and amplitude differences
BAEP alternating polarity Ans: reduces stimulus artifact
BAEP masking Ans: recommended contralateral ear (non-
stimulated ear) be masked with white noise at 60 dB pe SPL to
prevent "crossover" responses.
BAEP electrode placement Ans: 1. (A1/A2) or left and right
mastoid process (M1/M2)
2. scalp at vertex (Cz)
3. Ground at Fz
© 2025 All rights reserved
BAEP Questions and Correct Answers
BAEP Ans: brainstem auditory evoked potential far field
generated by the auditory pathway and is stimulated by sound
typically monitored during surgery within the posterior fossa
BAEP latencies Ans: wave I - 1.7
wave III - 3.9
wave V - 5.7
most important waves I and V
wave 1 generator Ans: distal VIII nerve (as it leave cochlea)
wave 2 generator Ans: proximal VIII nerve (as it enters brianstem)
wave 3 generator Ans: medulla in brainstem (cochlear
nucleus)(superior olivary complex)
wave 4 generator Ans: brainstem
wave 5 generator Ans: midbrain (lateral lemniscus)(inferior
colliculus)
changes in wave 1 Ans: consistent with auditory nerve
dysfunction
© 2025 All rights reserved
, 2 | Page
delay in wave 1-3 Ans: consistent with auditory nerve dysfunction
changes in wave 3-5 Ans: consistent with brainstem dysfunction
BAEP stimulus Ans: broad band clicks
recommended BAEP stim intensity Ans: 60-70 dB HL
100 dB SPL
BAEP stimulus delivery Ans: delivered one ear at a time. ipsilateral
ear to surgery monitored continuously. contralateral ear
stimulated at intervals to check for developing asymmetry, latency
and amplitude differences
BAEP alternating polarity Ans: reduces stimulus artifact
BAEP masking Ans: recommended contralateral ear (non-
stimulated ear) be masked with white noise at 60 dB pe SPL to
prevent "crossover" responses.
BAEP electrode placement Ans: 1. (A1/A2) or left and right
mastoid process (M1/M2)
2. scalp at vertex (Cz)
3. Ground at Fz
© 2025 All rights reserved
