Gerdfeldter Billy, Greičiūtė Mingailė, Wiens Stefan
Stockholm University, Department of Psychology, Sweden.
Stockholm University, Department of Psychology, Sweden.
Neuropsychologia. 2025 Jan 29;207:109064. doi: 10.1016/j.neuropsychologia.2024.109064. Epub 2024 Dec 30.
In the search for the neural correlates of auditory consciousness, a candidate has been found using electroencephalography: the auditory awareness negativity (AAN). Earlier studies have investigated the AAN in response to lateralized sound. With headphones, there is a clear lateralization of AAN when two auditory lateralization cues are combined: the interaural level difference (ILD) and interaural time difference (ITD). To separate the contribution of these cues to a lateralized AAN, we tested three stimulus conditions with headphones: A combination of ILD and ITD, solely ITD, and monaural stimulation. Results suggest that ILD and ITD are required in conjunction for a lateralized AAN, and neither ITD nor monaural stimulation can yield a lateralized AAN. These results suggest that event-related potentials may be limited in measuring the lateralization of the neural correlates of auditory consciousness to lateralized sounds, depending on auditory cues and acoustic environment.
在寻找听觉意识的神经关联物的过程中，通过脑电图已发现一个候选对象：听觉意识负波（AAN）。早期研究已对响应侧化声音的AAN进行了调查。使用耳机时，当两种听觉侧化线索相结合时，即耳间水平差异（ILD）和耳间时间差异（ITD），AAN会出现明显的侧化。为了区分这些线索对侧化AAN的贡献，我们使用耳机测试了三种刺激条件：ILD和ITD的组合、仅ITD以及单耳刺激。结果表明，侧化AAN需要ILD和ITD共同作用，单独的ITD或单耳刺激都无法产生侧化AAN。这些结果表明，根据听觉线索和声学环境，事件相关电位在测量听觉意识的神经关联物对侧化声音的侧化方面可能存在局限性。
