Guinea pig cochlear implant sensitivity is measured via inferior colliculus evoked potentials

Evidence

In each session and for each pulse shape, a threshold level was first defined as the level producing a detectable IC evoked potential after averaging; the maximum level of stimulation was defined as the level triggering a detectable motor response of the animal’s left cheek. Between these two values, a series of current levels was defined in 1.5-dB steps. For each pulse shape and each level tested, the recordings alternated between polarities. Between 50 and 100 averages were obtained for each combination of pulse shape, polarity and level and the corresponding IC evoked potentials were recorded. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2293

Categorization

• XREF: The use of inferior colliculus evoked potentials as a readout of cochlear implant activation connects to the broader auditory brainstem pathway literature in psychoacoustics.