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Test-Retest of Long Latency Auditory Evoked Potentials (P300) with Pure Tone and Speech Stimuli

机译:带有纯音和语音刺激的长时延听觉诱发电位(P300)的再测试

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Introduction Long latency auditory evoked potentials, especially P300, have been used for clinical evaluation of mental processing. Many factors can interfere with Auditory Evoked Potential - P300 results, suggesting large intra and inter-subject variations. Objective The objective of the study was to identify the reliability of P3 components (latency and amplitude) over 4-6 weeks and the most stable auditory stimulus with the best test-retest agreement. Methods Ten normal-hearing women participated in the study. Only subjects without auditory processing problems were included. To determine the P3 components, we elicited long latency auditory evoked potential (P300) by pure tone and speech stimuli, and retested after 4-6 weeks using the same parameters. We identified P300 latency and amplitude by waveform subtraction. Results We found lower coefficient of variation values in latency than in amplitude, with less variability analysis when speech stimulus was used. There was no significant correlation in latency measures between pure tone and speech stimuli, and sessions. There was a significant intrasubject correlation between measures of latency and amplitude. Conclusion These findings show that amplitude responses are more robust for the speech stimulus when compared with its pure tone counterpart. The P300 indicated stability for latency and amplitudemeasures when the test-retest was applied. Reliability was higher for amplitude than for latency, with better agreement when the pure tone stimulus was used. However, further research with speech stimulus is needed to clarify how these stimuli are processed by the nervous system.
机译:简介长潜伏期听觉诱发电位,尤其是P300,已用于心理加工的临床评估。许多因素可能会干扰听觉诱发电位-P300结果,表明受试者内部和受试者之间存在较大差异。目的本研究的目的是确定4-6周内P3成分(潜伏期和振幅)的可靠性以及具有最佳重测一致性的最稳定的听觉刺激。方法十名听力正常的女性参加了这项研究。仅包括没有听觉处理问题的受试者。为了确定P3成分,我们通过纯音调和语音刺激诱发了长时间潜伏期听觉诱发电位(P300),并在4-6周后使用相同的参数对其进行了重新测试。我们通过波形减法确定了P300的等待时间和幅度。结果我们发现,使用语音刺激时,潜伏期的变异系数值比振幅低,变异性分析更少。在纯音和语音刺激与会话之间的等待时间测量中没有显着相关性。潜伏期和幅度的度量之间存在显着的受试者内部相关性。结论这些发现表明,与纯音相比,语音刺激的振幅响应更健壮。当进行重新测试时,P300表示延迟和幅度测量的稳定性。振幅的可靠性高于延迟的可靠性,使用纯音调刺激时一致性更高。但是,需要对语音刺激进行进一步的研究,以阐明神经系统如何处理这些刺激。

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