Bhagat Shaum P
The University of Memphis, School of Audiology and Speech-Language Pathology, Memphis, TN 38015, USA.
Int J Audiol. 2006 Oct;45(10):609-16. doi: 10.1080/14992020600937444.
The purpose of this investigation was to compare the effects of monaural and binaural stimulation on unilaterally-measured vestibular evoked myogenic potential (VEMP) magnitude and latency. The subjects were eighteen normal-hearing adults with no history of vestibular disease. Monaural VEMPs were acquired with air-conducted (AC) and bone-conducted (BC) 500 Hz tone bursts presented at 95 dB nHL and 70 dB nHL, respectively. These stimuli were simultaneously paired with 95 dB nHL contralateral tone bursts at 250, 500, 750, or 1000 Hz during acquisition of binaural VEMPs. Results indicated that AC-VEMP relative magnitudes decreased in each of the binaural conditions compared to the monaural condition. However, no changes in relative magnitude between conditions occurred for BC-VEMPs. Similar latencies were observed for monaural and binaural VEMPs. Differences in bilateral interaction seen between the AC-VEMP and BC-VEMP conditions are consistent with modification of sound transmission through the ear during presentations of binaural sound.
本研究的目的是比较单耳刺激和双耳刺激对单侧测量的前庭诱发肌源性电位（VEMP）幅度和潜伏期的影响。受试者为18名听力正常、无前庭疾病史的成年人。单耳VEMP分别通过在95 dB nHL和70 dB nHL呈现的气导（AC）和骨导（BC）500 Hz短纯音获得。在获取双耳VEMP期间，这些刺激与250、500、750或1000 Hz的95 dB nHL对侧短纯音同时配对。结果表明，与单耳条件相比，在每种双耳条件下AC-VEMP相对幅度均降低。然而，BC-VEMP在不同条件之间的相对幅度没有变化。单耳和双耳VEMP的潜伏期相似。AC-VEMP和BC-VEMP条件之间观察到的双侧相互作用差异与双耳声音呈现期间通过耳朵的声音传输改变一致。
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