It plays an essential role in maintenance of normal retinal and cochlear function.
2.
The goal of bone ABR is to estimate cochlear function and to help identify the type of hearing loss present.
3.
Nevertheless, due to normal cochlear function, any tonal stimulus ( even continuous long-duration tones ), presented at high intensity levels, will result in stimulation of higher frequency cochlear regions ( " upward spread of excitation " ).
4.
These were : the response occurred ipsilateral to the ear stimulated, the click threshold was high, the response did not depend upon hearing ( cochlear function ) per se, it scaled in direct proportion to the level of tonic neck contraction, the response was small ( although large compared to many evoked potentials ) and required averaging, and only the initial positive-negative response ( p13-n23 by latency ) was actually vestibular-dependent.
मोबाइल