Which change is associated with an acoustic neuroma as detected in BAEPs?

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The association of increased I-II inter-peak latency and the potential loss of some waves in the context of an acoustic neuroma is rooted in the pathology of the condition. An acoustic neuroma, which is a benign tumor on the vestibulocochlear nerve (cranial nerve VIII), can disrupt the normal conduction of neural signals within this pathway.

In the Brainstem Auditory Evoked Potentials (BAEPs), the I-II inter-peak latency measures the time it takes for electrical signals to travel from the cochlear nucleus (wave I) to the superior olivary complex (wave II). In cases of acoustic neuroma, this latency often increases due to the tumor's impact on the nerve's ability to transmit signals efficiently. As the tumor compresses the nerve, it may also lead to the attenuation or loss of certain waves as the nerve function deteriorates.

Therefore, the observation of increased I-II inter-peak latency alongside the loss of some waveforms in BAEPs is consistent with what is expected from the presence of an acoustic neuroma, making it the correct answer for this question.

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