Characterization of Auditory Evoked Potential for Different Tones in Marmoset Primary Auditory Cortex

Marmosets are highly vocal, social primates, which place them in a leading position for studies comprising the auditory system. Single-neuron recordings have previously described a tonotopic organization in marmoset A1. However, it is still unknown how the processing of auditory stimuli of different frequencies is reflected in the Local Field Potential (LFP) of marmoset's A1. In this work, we address this issue by assessing sound frequency tuning in marmoset A1 using auditory evoked potentials (AEP) extracted from LFPs. We found that the amplitude and latency of AEPs for different frequencies reflect previously reported behavioral audiograms. Our results reinforce the AEP as an electrophysiological signature of both cortical auditory processing and animal behavioral outcomes.