Eckhorn Reinhard, Wilms Marcus, Schanze Thomas, Eger Marcus, Hesse Lutz, Eysel Ulf T, Kisvárday Zoltán F, Zrenner Eberhart, Gekeler Florian, Schwahn Helmut, Shinoda Keisuke, Sachs Helmut, Walter Peter
Department of Physics, Neurophysics Group, Philipps-University Marburg, and University Eye Hospital, Medical Faculty University of Tübingen, Germany.
Vision Res. 2006 Sep;46(17):2675-90. doi: 10.1016/j.visres.2006.01.034. Epub 2006 Mar 29.
We investigated cortical responses to electrical stimulation of the retina using epi- and sub-retinal electrodes of 20-100 microm diameter. Temporal and spatial resolutions were assessed by recordings from the visual cortex with arrays of microelectrodes and optical imaging. The estimated resolutions were approximately 40 ms and approximately 1 degrees of visual angle. This temporal resolution of 25 frames per second and spatial resolution of about 0.8 cm at about 1m and correspondingly 8 cm at 10 m distance seems sufficient for useful object recognition and visuo-motor behavior in many in- and out-door situations of daily life.
我们使用直径为20 - 100微米的视网膜上和视网膜下电极，研究了皮质对视网膜电刺激的反应。通过使用微电极阵列和光学成像从视觉皮质进行记录，评估了时间和空间分辨率。估计的分辨率分别约为40毫秒和约1度视角。这种每秒25帧的时间分辨率以及在约1米距离处约0.8厘米、在10米距离处相应为8厘米的空间分辨率，对于在许多日常生活的室内和室外场景中进行有用的物体识别和视觉运动行为似乎是足够的。
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