Cnim Review – Baep Questions & Answers

CNIM REVIEW – BAEP QUESTIONS & ANSWERS

Wave I Generator - Answers :Distal CN8 Nerve

distal cn 8 nerve problems affects on BAEP - Answers :Cause increase in absolute
latencies

changes cased by kinked earphone tubing? - Answers :increase in absolute latencies

changes cased by fluid in earphone tubing? - Answers :increase in absolute latencies

changes cased by excessive earwax (cerumen)? - Answers :increase in absolute
latencies

changes cased by perforated or Hardened tympanic membrane? - Answers :increase in
absolute latencies

changes cased by a middle ear infection [otitus media] - Answers :increase in absolute
latencies

changes cased by artificial Ventilation [change in pressure of middle ear]? - Answers
:increase in absolute latencies

changes cased by otosclerosis [calcification of stapies] - Answers :increase in absolute
latencies

changes cased by cholesteratoma [skin cyst in middle ear] - Answers :increase in
absolute latencies

changes caused by compromised blood supply to cochlea - Answers :increase in
absolute latencies

changes caused by conductive/peripheral hearing loss - Answers :increase in absolute
latencies

what click polarity do you use to improve wave 1 - Answers :alternating or rarefraction

to improve wave 1 change stimulation by - Answers :increase intensity

wave 2 generator - Answers :proximal cn8 nerve [cochlear nucleus]

proximal cn8 n problems affect BAEPs - Answers :normal at high intensity stimulation
but increased absolute latencies at lower intensity stimulation

, changes caused by high frequency hearing loss - Answers :normal at high intensity
stimulation but increased absolute latencies at lower intensity stimulation

changes caused by presbycusis [age related hearing loss] - Answers :normal at high
intensity stimulation but increased absolute latencies at lower intensity stimulation

changes caused by sensorineural hearing loss - Answers :normal at high intensity
stimulation but increased absolute latencies at lower intensity stimulation

where does the cn8 pathway decussate - Answers :after the proximal n/cochlear
nucleus in the pons

wave 3 generator - Answers :superior olivary complex

problems seen in superior olivary complex - Answers :increased wave 1-3 and 1-5 inter-
peak latencies

changes caused by acoustic neuroma - Answers :increased wave 1-3 and 1-5 inter-
peak latencies

changes caused by vestibular schwannoma - Answers :increased wave 1-3 and 1-5
inter-peak latencies

changes caused by neurofibromatosis type 2 - Answers :increased wave 1-3 and 1-5
inter-peak latencies

changes caused by retraction of cerebellum in posterior fossa approach - Answers
:increased wave 1-3 and 1-5 inter-peak latencies

improve wave 3 by changing sim how - Answers :decreasing the rate

wave 4 generator - Answers :lateral lemniscus

problems arise in lateral lemniscus - Answers :increased wave 3-5 and 1-5 inter-peak
latencies

changes caused by pontine glioma - Answers :increased wave 3-5 and 1-5 inter-peak
latencies

changes caused by midbrain infarction - Answers :increased wave 3-5 and 1-5 inter-
peak latencies

changes caused by brainstem structures - Answers :change in wave 3 and 5 and 1-5
inter-peak latencies

changes affecting temporal lobe or cortex - Answers :normal BAEPs