Vasaghi-Gharamaleki Behnoosh, Naser Zahra
Department of Basic Sciences, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Rehabilitation Research Center, Iran University of Medical Sciences, Tehran, Iran.
Basic Clin Neurosci. 2017 Sep-Oct;8(5):413-418. doi: 10.18869/nirp.bcn.8.5.413.
Cervical spine abnormalities can affect the ear vessels and or nerves with different mechanisms. Ear dysfunctions following cervical spine injuries can be manifested as hearing loss, vertigo, or tinnitus. Usually, cervical spine injuries can cause pain and Range of Motion (ROM) limitation. The major objective of this study was to determine which cervical ROM limitation was accompanied with higher level of hearing loss.
In this cross-sectional study, 42 volunteers (20 women and 22 men) with cervical spine injury and pain participated after giving their informed consent. Audiometry, tympanometry, and pure-tone threshold of individuals were taken in frequencies from 250 to 8000 Hz in all cases. The ROM limitation in flexion, extension and rotation was recorded.
About 53% of participants had bilateral hearing loss. In 40.48% (n=17) of cases, rotation to the left was limited. Flexion and extension motion were restricted on 23.8% (n=10) and 30.95% (n=13) of the participants, respectively. There was no statistically significant relationship between sex and hearing loss but a significant correlation was observed between hearing loss and ROM limitation of rotation to the left in men.
According to the present study, the likelihood of hearing loss was high in patients with cervical left rotation limitation, and that the incidence of hearing loss following the cervical spine injuries was more in men. It seems that left Rotation limitation can be used as a predictor to diagnosis of hearing impairment following the cervical spine injuries (especially in men).
颈椎异常可通过不同机制影响耳部血管和神经。颈椎损伤后的耳部功能障碍可表现为听力丧失、眩晕或耳鸣。通常，颈椎损伤会导致疼痛和活动范围（ROM）受限。本研究的主要目的是确定哪种颈椎活动范围受限与更高水平的听力丧失相关。
在这项横断面研究中，42名有颈椎损伤和疼痛的志愿者（20名女性和22名男性）在签署知情同意书后参与。所有病例均测量了个体在250至8000赫兹频率范围内的听力测定、鼓室图和纯音阈值。记录了屈伸和旋转时的活动范围受限情况。
约53%的参与者有双侧听力丧失。在40.48%（n = 17）的病例中，向左旋转受限。分别有23.8%（n = 10）和30.95%（n = 13）的参与者屈伸运动受限。性别与听力丧失之间无统计学显著关系，但在男性中观察到听力丧失与向左旋转活动范围受限之间存在显著相关性。
根据本研究，颈椎向左旋转受限的患者听力丧失的可能性较高，且颈椎损伤后男性听力丧失的发生率更高。似乎向左旋转受限可作为诊断颈椎损伤后听力障碍的一个预测指标（尤其是在男性中）。
