Abstract
We investigated the effects of the stimulation side on auditory evoked magnetic fields elicited by bone-conducted ultrasounds. N1m elicited by bone-conducted ultrasounds at ipsilateral and contralateral mastoid/strenocleidomastoid were measured in eight normal-hearing volunteers. Air-conducted tone bursts were also presented to the ipsilateral and contralateral ear. Equivalents current dipoles (ECDs) of N1m were estimated in both hemispheres at N1m peak latencies. For bone-conducted ultrasounds as well as air-conducted sounds, N1m evoked by contralateral stimuli was larger in ECD moment and shorter in latency than that evoked by ipsilateral stimuli. These results suggest that bone-conducted ultrasounds enter the auditory pathway before superior olivary nucleus.
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