|تاریخ چاپ: 1399/08/04|
|Comparing mastoid and posterior cervical muscles vibration effects on eye movement in normal subjects|
|Author(s):||Najmeh Naghibi*، Shaabani Moslem، Enayatollah Bakhshi|
Background and AimVibration is a method for stimulating the vestibular system. This method can unmask asymmetry between two vestibular systems (such as unilateral peripheral vestibular disorders). The occurrence of vibration-induced nystagmus (VIN) in healthy subjects can affect the diagnosis of patients with unilateral peripheral vestibular disorders. Thus, the evaluation of VIN in healthy subjects is critical to help the diagnosis of unilateral peripheral vestibular disorders.
MethodsThis study was carried out on 72 healthy subjects (mean ± SD age: 27.12 ± 4.97 years) in the Auditory and Balance Clinic of Rofeideh Rehabilitation Hospital. Vibration sti mulation with a frequency of 30 and 100 Hz was used on mastoid and posterior cervical muscles (PCMs) and simultaneously eye movements were recorded and analyzed using videonystagmography.
ResultsThe mastoid vibration with a frequency of 30 and 100 Hz, respectively produced VIN in 16.67 % and 27.78 % of subjects and VIN observed in PCMs vibration with a frequency of 30 and 100 Hz in 4.17 % and 9.72 % of the subjects.
ConclusionThe occurrence of VIN in healthy subjects was more probable with mastoid vibration in 100 Hz. In this study, VIN was predominantly horizontal, its direction was toward the stimulated side, and its slow phase velocity was lower than 5 deg/s. These criteria could be used for differentiation between normal and abnormal subjects.
|Keywords:||Vibration-induced nystagmus، vestibular vibration، mastoid، posterior cervicalmuscle، videonystagmography|
|Article Type:||Research/Original Article|
|Published:||Auditory and Vestibular Research, Volume:28 Issue: 4, 2019|
|Full text:||PDF is available on the website.|