Relation between auditory stimulus intensity and response of P300 with eyes-opened and eyes-closed state

Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286) Pub Date : 1998-10-29 DOI:10.1109/IEMBS.1998.746995

T. Fukami, T. Shiina, F. Ishikawa, Y. Saito

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Abstract

For the purpose of examining how the auditory stimulus level and the eyesight have a mutual influence on ERP, we tried to investigate the relation between auditory stimulus level and latency of P300 with eyes-opened (EO) and eyes-closed (EC) state. Two auditory stimulus levels are selected as high-intensity (HI; 80 dBNHL) and low intensity (LI; 10 dBNHL). It has been regarded that the latency of P300 became longer as the auditory stimulus level decreased while the latency was not so different between EO and EC. However, we found that the latter did not always hold true though the former coincided with our experimental results. The latency at HI tended to be longer comparatively with EO, while in the case of LI the latency was longer with EC. Consequently, the latency variation resulting from the change of stimulus level with EC was larger than with EO. In this paper, we evaluated this phenomenon more quantitatively.

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听觉刺激强度与睁眼、闭眼状态下P300反应的关系

为了研究听觉刺激水平和视力对ERP的相互影响，我们试图研究听觉刺激水平与睁眼和闭眼状态下P300潜伏期的关系。选择两个听觉刺激水平作为高强度(HI;80 dBNHL)和低强度(LI;10 dBNHL)。认为P300潜伏期随着听觉刺激水平的降低而延长，而EO与EC潜伏期差异不大。然而，我们发现后者并不总是成立，尽管前者符合我们的实验结果。HI时潜伏期较EO长，而LI时潜伏期较EC长。因此，刺激水平变化引起的潜伏期变化大于刺激水平变化引起的潜伏期变化。在本文中，我们对这一现象进行了更定量的评价。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 20th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Vol.20 Biomedical Engineering Towards the Year 2000 and Beyond (Cat. No.98CH36286)

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