V1 neurons respond to luminance changes faster than contrast changes

分类： 生物学 >> 生物物理学 提交时间： 2016-05-11

Wang, Wen-Liang Li, Ran Li, Da-Peng Wang, Yi Wang, Wen-Liang Li, Ran Ding, Jian Tao, Louis Tao, Louis

摘要： Luminance and contrast are two major attributes of objects in the visual scene. Luminance and contrast information received by visual neurons are often updated simultaneously. We examined the temporal response properties of neurons in the primary visual cortex (V1) to stimuli whose luminance and contrast were simultaneously changed by 50 Hz. We found that response tuning to luminance changes precedes tuning to contrast changes in V1. For most V1 neurons, the onset time of response tuning to luminance changes was shorter than that to contrast changes. Most neurons carried luminance information in the early response stage, while all neurons carried both contrast and luminance information in the late response stage. The early luminance response suggests that cortical processing for luminance is not as slow as previously thought.

同行评议状态:待评议

 点击量 2011  下载量 1053  评论