brainstem auditory evoked potential brainstem auditory evoked potential in human neuroanatomy, brainstem auditory evoked potentials (baeps), also called brainstem auditory evoked responses (baers), are very small auditory evoked potentials in response to an auditory stimulus, which are recorded by electrodes placed on the scalp. they reflect neuronal activity in the auditory nerve, cochlear nucleus, superior olive, and inferior colliculus of the brainstem. they typically have a response latency of no more than six milliseconds with an amplitude of approximately one microvolt.