Characteristics of cervical vestibular evoked myogenic potential in different test positions
10.3760/cma.j.issn.1673-0860.2016.09.003
- VernacularTitle:不同体位下颈前庭诱发肌源性电位的特点
- Author:
Xinxing FU
1
;
Bo LIU
;
Beier QI
;
Chen JI
;
Jingzi GUAN
Author Information
1. 100005 首都医科大学附属北京同仁医院耳鼻咽喉头颈外科,北京市耳鼻咽喉科研究所,耳鼻咽喉头颈科学教育部重点实验室(首都医科大学)
- Keywords:
Vestibular evoked myogenic potentials;
Posture;
Saccule and utricle
- From:
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
2016;51(9):650-654
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the characteristics of cervical vestibular evoked myogenic potential (cVEMP) of normal youth with different test positions,to study the relationship between test positions and test parameters,and to explore the suitable test position for clinical practice.Methods Fifty healthy young volunteers (25 males,25 females,100 ears) were enrolled in this study.Two test positions were used,including sitting with the head turned away from the test (SIT) and supine with the head held straight up (SUP).The derivation rate,latency and amplitude were analyzed.Results The derivation rates of both SIT and SUP were 100％.The VEMP threshold in SIT was (93.5 ±4.3) dBnHL.The latency of P1 and N2 in SIT was longer than that in SUP,with significant different (P ＜ 0.05),the amplitude of P1-N2 in SIT was less than that in SUP,with significant different (P ＜ 0.05).Regarding to the latency of P1 and N2 in SIT,the left was longer that right,with (P =0.013) and (P =0.015) respectively.The latency in SUP between sides was not significant (P ＞ 0.05).The amplitude ratio and asymmetry in SIT were more obvious than in supine position (P =0.009 and 0.016).In SIT position the P1-N2 amplitude in males was larger than in females,with significant difference (P =0.031);In SUP position the P1-N2 amplitude in males was less than in females,with significant difference (P =0.043).Conclusion The cVEMP can be affected by the different test positions,it is recommended to select a more suitable test position according to the condition of the subject and the purpose of the test.
