Objective: To identify the characteristics of the air-conducted ocular vestibular-evoked myogenic potential (oVEMP) in the young normal Chinese subjects.
Methods: Twenty five normal subjects were recruited for conventional examinations of oVEMP. The subjects were 19 - 45 years of age [(24.3 ± 5.6) years], 12 males and 13 females. 500 Hz air-conducted tone burst was employed for examination. The threshold of oVEMP in each ear was examined; patterns of these waves were observed and the normal ranges of the oVEMP waves responded to 100 dBnHL were calculated.
Results: All subjects were elicited with normal oVEMP N1-P1 waves in both ears. The response rate in these subjects was 100%. The threshold of oVEMP examination was (86.6 ± 3.6) dBnHL (x(-) ± s), latency N1 (10.1 ± 0.4) ms, latency P1 (14.7 ± 1.2) ms, interval N1-P1 (4.5 ± 1.0) ms, amplitude (7.9 ± 4.4) µV.
Conclusions: Air-conducted oVEMP is a kind of vestibular-ocular reflex respond to intensive sound generated by otolithic vestibular end organs. It is stable in the young normal subjects with minor variabilities.
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