Effects of vestibular nerve section on sound-evoked myogenic potentials in the sternocleidomastoid muscle of monkeys.
OBJECTIVE
The aim of this study was to elucidate the neural pathway for sound-evoked myogenic potentials (SEMPs) in monkeys with characteristics similar to those of vestibular evoked myogenic potentials in humans.


METHODS
Six macaque monkeys were examined. The effects of total and selective vestibular nerve section on the SEMPs were evaluated in three monkeys.


RESULTS
After total vestibular nerve section, the SEMPs and caloric nystagmus were eliminated, and the auditory brainstem response remained. After selective superior vestibular nerve section, the SEMPs remained, but caloric nystagmus was eliminated.


CONCLUSIONS
The inferior vestibular nerve comprises a neural pathway for SEMPs in monkeys.


CONCLUSIONS
SEMP in monkeys may provide a model of human VEMPs.
Tsubota
Masahito
M
Department of Otolaryngology, University of Toyama, 2630 Sugitani, Toyama, Japan.
Shojaku
Hideo
H
Hori
Etsuro
E
Fujisaka
Michiro
M
Hayashi
Nakamasa
N
Kurimoto
Masanori
M
Hatakeyama
Noboru
N
Yamazaki
Mitsuaki
M
Nishijo
Hisao
H
Ono
Taketoshi
T
Yamamoto
Hiroshi
H
Watanabe
Yukio
Y
D000161:Acoustic Stimulation; D000818:Animals; D002138:Calibration; D004576:Electromyography; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D016057:Evoked Potentials, Auditory, Brain Stem / Q000502:physiology; D006358:Hot Temperature; D008251:Macaca; D008253:Macaca mulatta; D018482:Muscle, Skeletal / Q000502:physiology*; D009434:Neural Pathways / Q000502:physiology; D009760:Nystagmus, Physiologic / Q000502:physiology; D007507:Therapeutic Irrigation; D014725:Vestibular Nerve / Q000502:physiology*