外周闪烁掩蔽对M通路和P通路反应的影响。
Effects of peripheral flicker masking on M- and P-pathway response.
作者信息
Reynolds C H, Crewther D P, Crewther S G, West S J
机构信息
School of Psychological Science, La Trobe University, Bundoora, Victoria, Australia.
出版信息
Aust N Z J Ophthalmol. 1998 May;26 Suppl 1:S117-9. doi: 10.1111/j.1442-9071.1998.tb01358.x.
PURPOSE
The effects of metahue and metacontrast masking on the responses of the M- and P-pathways of the human visual system were investigated using temporal analysis of the multifocal flash visually evoked potential (VEP) (VERIS system).
METHODS
The experiments were carried out at three achromatic luminance contrasts, 24, 70 and 96%, with three peripheral masks: a steady 65% grey mask, a grey flicker mask and an isoluminant red/green flicker mask. The stimuli were viewed monocularly and the mask and VERIS stimuli superposed with a mirror-aperture system.
RESULTS/CONCLUSIONS: The masks had no significant effect on the behaviour of the M-pathway as stimulus contrast increased. The amplitude of the P-pathway was found to be approximately level at all contrasts of the stimulus and with all three masks rather than showing the expected steady increase in activity with increasing stimulus contrast.
目的
使用多焦点闪光视觉诱发电位（VEP）（VERIS系统）的时间分析，研究元色调和元对比度掩蔽对人类视觉系统M通路和P通路反应的影响。
方法
实验在三种消色差亮度对比度（24%、70%和96%）下进行，使用三种外周掩蔽：稳定的65%灰色掩蔽、灰色闪烁掩蔽和等亮度红/绿闪烁掩蔽。单眼观察刺激，掩蔽和VERIS刺激通过镜孔系统叠加。
结果/结论：随着刺激对比度增加，掩蔽对M通路的行为没有显著影响。发现P通路的振幅在刺激的所有对比度下以及使用所有三种掩蔽时大致保持水平，而不是随着刺激对比度增加呈现预期的活动稳定增加。
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