Seol Hye Yoon, Kang Soojin, Kim Sungkean, Kim Jihoo, Kim Euijin, Hong Sung Hwa, Moon Il Joon
Department of Communication Disorders, Ewha Womans University, Seoul 03760, Republic of Korea.
Center for Digital Humanities and Computational Social Sciences, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea.
J Clin Med. 2024 Aug 22;13(16):4941. doi: 10.3390/jcm13164941.
It has been reported in many previous studies that the lack of auditory input due to hearing loss (HL) can induce changes in the brain. However, most of these studies have focused on individuals with pre-lingual HL and have predominantly compared the characteristics of those with normal hearing (NH) to cochlear implant (CI) users in children. This study examined the visual and auditory evoked potential characteristics in NH listeners, individuals with bilateral HL, and CI users, including those with single-sided deafness. A total of sixteen participants (seven NH listeners, four individuals with bilateral sensorineural HL, and five CI users) completed speech testing in quiet and noise and evoked potential testing. For speech testing, the Korean version of the Hearing in Noise Test was used to assess individuals' speech understanding ability in quiet and in noise (noise from the front, +90 degrees, and -90 degrees). For evoked potential testing, visual and auditory (1000 Hz, /ba/, and /da/) evoked potentials were measured. The results showed that CI users understood speech better than those with HL in all conditions except for the noise from +90 and -90 degrees. In the CI group, a decrease in P1 amplitudes was noted across all channels after implantation. The NH group exhibited the highest amplitudes, followed by the HL group, with the CI group (post-CI) showing the lowest amplitudes. In terms of auditory evoked potentials, the smallest amplitude was observed in the pre-CI condition regardless of the type of stimulus. Conclusions: To the best of our knowledge, this is the first study that examined visual and auditory evoked potentials based on various hearing profiles. The characteristics of evoked potentials varied across participant groups, and further studies with CI users are necessary, as there are significant challenges in collecting and analyzing evoked potentials due to artifact issues on the CI side.
此前许多研究报告称，听力损失（HL）导致的听觉输入缺失会引起大脑变化。然而，这些研究大多聚焦于语前聋个体，且主要比较了儿童中听力正常（NH）者与人工耳蜗（CI）使用者的特征。本研究考察了NH听力者、双侧HL个体以及CI使用者（包括单侧聋者）的视觉和听觉诱发电位特征。共有16名参与者（7名NH听力者、4名双侧感音神经性HL个体和5名CI使用者）完成了安静和噪声环境下的言语测试以及诱发电位测试。对于言语测试，使用韩语版噪声环境下听力测试来评估个体在安静和噪声环境（来自前方、+90度和 -90度的噪声）中的言语理解能力。对于诱发电位测试，测量了视觉和听觉（1000赫兹、/ba/和/da/）诱发电位。结果显示，除了来自+90度和 -90度的噪声外，在所有条件下CI使用者的言语理解都优于HL个体。在CI组中，植入后所有通道的P1波幅均下降。NH组波幅最高，其次是HL组，CI组（植入后）波幅最低。在听觉诱发电位方面，无论刺激类型如何，在植入前CI的情况下观察到的波幅最小。结论：据我们所知，这是第一项基于各种听力状况考察视觉和听觉诱发电位的研究。诱发电位特征在不同参与者组中有所不同，由于CI侧存在伪迹问题，在收集和分析诱发电位方面存在重大挑战，因此有必要对CI使用者进行进一步研究。
