Central processing

Auditory Brainstem Responses (ABRs)

also called Brainstem Auditory Evoked Responses (BAERs)
EEG recorded in response to repeated presentations of sounds of specified frequency and intensity – averaged many times to filter background electrical noise
peaks in the waveform (I, II, III, etc.) correspond to successive stages in the auditory pathway (auditory nerve, cochlear nucleus, superior olive, etc.)
ascribed to the nuclei, but likely are due to the nerve pathways
one way to assess hearing thresholds (determine an audiogram) without requiring behavioural responses