Sound-evoked myogenic potentials on the sternocleidomastoid muscle in monkeys.
Acta Otolaryngol
; 126(11): 1171-5, 2006 Dec.
Article
en En
| MEDLINE
| ID: mdl-17050309
ABSTRACT
CONCLUSION:
We recorded sound-evoked myogenic potentials of the sternocleidomastoid (SCM) muscle using awake monkeys. The characteristics of these potentials are similar to those of vestibular evoked myogenic potentials (VEMPs) in humans, suggesting that the sound-evoked myogenic potentials of the SCM muscle in monkeys may be utilized as an animal model of VEMPs.OBJECTIVE:
The pathway of the VEMPs remains uncertain as no animal model has yet been used to record sound-evoked myogenic potentials in the SCM muscle. Therefore, the present study aimed to establish an animal model of VEMPs using macaque monkeys. MATERIALS ANDMETHODS:
Four macaque monkeys were used. A pair of electrodes was attached on the SCM muscle ipsilateral side to the intense sound stimulation.RESULTS:
The sound-evoked myogenic potentials of the SCM muscle exhibited a biphasic waveform. When a click at 125 dBSPL was applied, the peak latency of the first positive wave was 12.5 ms and was not delayed when the stimulating sound intensity was reduced. The thresholds of the myogenic potentials were 103 dBSPL, which were 43 dB higher than those of the auditory brainstem response (ABR). When a short tone burst was applied, the reactive optimal frequency of the myogenic potentials was relatively low (500-1000 Hz).
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Bases de datos:
MEDLINE
Asunto principal:
Médula Espinal
/
Nervio Vestibular
/
Estimulación Acústica
/
Potenciales Evocados Auditivos del Tronco Encefálico
/
Músculo Esquelético
/
Potenciales Evocados Motores
/
Electromiografía
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Acta Otolaryngol
Año:
2006
Tipo del documento:
Article
País de afiliación:
Japón