Aljarboa Ghadah S, Bell Steve L, Simpson David M
Institute of Sound and Vibration Research, University of Southampton, Southampton, UK.
Communication Sciences, Princess Nora bint Abdul Rahman University, Riyadh, Saudi Arabia.
Int J Audiol. 2023 Mar;62(3):199-208. doi: 10.1080/14992027.2022.2035832. Epub 2022 Feb 13.
To explore the detection of cortical responses to continuous speech using a single EEG channel. Particularly, to compare detection rates and times using a cross-correlation approach and parameters extracted from the temporal response function (TRF).
EEG from 32-channels were recorded whilst presenting 25-min continuous English speech. Detection parameters were cross-correlation between speech and EEG (XCOR), peak value and power of the TRF filter (TRF-peak and TRF-power), and correlation between predicted TRF and true EEG (TRF-COR). A bootstrap analysis was used to determine response statistical significance. Different electrode configurations were compared: Using single channels Cz or Fz, or selecting channels with the highest correlation value.
Seventeen native English-speaking subjects with mild-to-moderate hearing loss.
Significant cortical responses were detected from all subjects at Fz channel with XCOR and TRF-COR. Lower detection time was seen for XCOR (mean = 4.8 min) over TRF parameters (best TRF-COR, mean = 6.4 min), with significant time differences from XCOR to TRF-peak and TRF-power. Analysing multiple EEG channels and testing channels with the highest correlation between envelope and EEG reduced detection sensitivity compared to Fz alone.
Cortical responses to continuous speech can be detected from a single channel with recording times that may be suitable for clinical application.
探讨使用单个脑电图（EEG）通道检测对连续语音的皮层反应。特别是，比较使用互相关方法和从时间响应函数（TRF）提取的参数的检测率和检测时间。
在呈现25分钟连续英语语音的同时记录32通道的脑电图。检测参数包括语音与脑电图之间的互相关（XCOR）、TRF滤波器的峰值和功率（TRF-峰值和TRF-功率），以及预测的TRF与真实脑电图之间的相关性（TRF-COR）。采用自助法分析来确定反应的统计学意义。比较了不同的电极配置：使用单个通道Cz或Fz，或选择相关性值最高的通道。
17名患有轻度至中度听力损失的以英语为母语的受试者。
在Fz通道，通过XCOR和TRF-COR检测到所有受试者都有显著的皮层反应。与TRF参数（最佳TRF-COR，平均=6.4分钟）相比，XCOR的检测时间更短（平均=4.8分钟），从XCOR到TRF-峰值和TRF-功率存在显著的时间差异。与单独使用Fz相比，分析多个脑电图通道并测试包络与脑电图之间相关性最高的通道会降低检测灵敏度。
可以从单个通道检测对连续语音的皮层反应，其记录时间可能适用于临床应用。
