The olivocochlear system is a component of the auditory system involved with the descending control of the cochlea. Its nerve fibres, the olivocochlear bundle (OCB), form part of the vestibulocochlear nerve (VIIIth cranial nerve, also known as the auditory-vestibular nerve), and project from the superior olivary complex in the brainstem (pons) to the cochlea.
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... “...enables auditory nerve fibres to signal changes in tone level with changes in discharge rate at lower signal-to-noise ratios than would be possible otherwise.” (Page 2002) One interpretation of these findings is that MOC stimulation selectively reduces the auditory nerve’s response to constant background noise, allowing a greater response to a transient sound (Guinan, 1996) ... In this way, MOC stimulation would reduce the effect of both suppressive and adaptive masking, and for this reason, the process has been referred to as “unmasking” or “antimasking” (Kawase et al ...
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