人工耳蜗使用者在视觉运动检测任务中表现出的视皮层可塑性。
Visual cortex plasticity in cochlear implant users revealed in a visual motion detection task.
机构信息
International Laboratory for Brain, Music and Sound Research, Montreal, Canada; Department of Otolaryngology-Head and Neck Surgery, McGill University, Montréal, Canada; Centre for Research on Brain, Language and Music, Montreal, Canada.
International Laboratory for Brain, Music and Sound Research, Montreal, Canada; Department of Psychology, University of Montreal, Montreal, Canada.
出版信息
Clin Neurophysiol. 2022 May;137:11-24. doi: 10.1016/j.clinph.2022.02.005. Epub 2022 Feb 17.
OBJECTIVE
The aim of this study was to investigate brain reorganization following cochlear implantation using electroencephalography, an implant-compatible technique to record electrical brain activity.
METHODS
We investigated cortical plasticity in cochlear implant (CI) users using visual evoked potentials in response to visual motion changes. We estimated visual and auditory neural sources in CI users (n = 20) and normal hearing (NH) matched control participants (n = 22).
RESULTS
Results showed intra-modal plasticity in the visual cortex of CI users, revealed by higher P1 and visual mismatch negativity amplitude, and greater contribution of the visual cortex during visual motion changes compared to NH controls.
CONCLUSIONS
Our results suggest more efficient processing of visual information in CI users that may reflect enhanced multimodal compensatory strategies during speech processing.
SIGNIFICANCE
This study showcases an objective, implant-compatible method that could be used in a clinical setting to measure and longitudinally track cortical plastic changes, enabling a better understanding of the link between individual patterns of cortical plasticity and CI outcomes.
目的
本研究旨在通过脑电图（一种可记录电脑活动的植入式兼容技术）来研究人工耳蜗植入后的大脑重组。
方法
我们使用视觉运动变化来诱发视觉诱发电位，以此来研究人工耳蜗植入者（n=20）的皮质可塑性。我们还对人工耳蜗植入者和正常听力（NH）匹配的对照组参与者（n=22）的视觉和听觉神经源进行了估计。
结果
结果表明，人工耳蜗植入者的视觉皮质存在内模态可塑性，表现为 P1 和视觉失匹配负波幅度较高，以及在视觉运动变化期间，视觉皮质的贡献大于 NH 对照组。
结论
我们的研究结果表明，人工耳蜗植入者对视觉信息的处理效率更高，这可能反映了在言语处理过程中增强了多模态补偿策略。
意义
本研究展示了一种客观的、植入式兼容的方法，可用于临床测量和纵向跟踪皮质可塑性变化，从而更好地理解皮质可塑性个体模式与人工耳蜗植入效果之间的联系。
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