Vestibular-evoked myogenic potentials recorded from miniature pigs and rats
LI Ya
YUAN Shuolong
ZHANG Yue
PAN Hongmei
REN Lili
ZHANG Liang
SHI Xi
QIAO Yuehua
Abstract：Objective To report vestibular evoked myogenic potentials from different recording sites (neck extensor muscle and masseter muscle) in mini pigs and rats. Methods Potentials were recorded from neck extensor muscles or masse-ter muscles in normal adult Bama mini pigs and rats anesthetized with 3% pentobarbital sodium and Sumianxin II using 1000 Hz tone bursts. Results At 80 dB SPL, the latency, amplitude and response rate of the first positive wave P was 6.45± 0.23 ms, 1.45 ± 0.49 uv and 58%, respectively, from rat neck extensor muscles;6.38 ± 0.34 ms, 1.57 ± 0.35 uv and 50%from rat masseter muscles;7.65 ± 0.64 ms, 1.66 ± 0.34 uv and 58%from mini pig neck extensor muscles;and 7.65 ± 0.64 ms,.31 ± 0.28 uv and 50% from mini pig masseter muscles. Conclusion VEMP can be recorded from neck extensor and masseter muscles in mini pigs and rats. Within a given species, VEMP amplitude and response rate are dependent on the site of record-ing, while latency is not. Analysis of the responses suggests that the optimal VEMP recording site is the masseter muscle in mini pigs but cervical extensor muscles in rats. At the same recording site, the latency and amplitude of VEMP are slightly greater in mini pigs than in rats.
Keywords：vestibular evoked myogenic potentialsmini pigratmasseter muscle myogenic potential
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 27-31 )