Position, size and luminosity of phosphenes generated by direct optic nerve stimulation
Position, size and luminosity of phosphenes generated by direct optic nerve stimulation
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DOI：
10.1016/s0042-6989(03)00013-0
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发表时间：
2003-04-01
期刊：
影响因子：
1.8
通讯作者：
Veraart, C
中科院分区：
文献类型：
--
作者：
Delbeke, J;Oozeer, M;Veraart, C
低强度电流脉冲，通过长期植入在失明视网膜色素变性患者视神经周围的袖状电极传递，产生视觉感觉。这些光幻视是在较低的阈值下获得的一列刺激比单脉冲，这表明存在一个空间和时间的整合机制。这些感知比模型模拟预测的要小得多。导出了一组方程，表明了脉冲电流、脉冲宽度、脉冲次数和脉冲频率对光幻视的位置、大小以及在一定程度上对光幻视亮度的影响。(C)2003爱思唯尔科技有限公司版权所有。
Pulses of low intensity current, delivered through a cuff electrode chronically implanted around the optic nerve of a blind retinitis pigmentosa patient generate visual sensations. These phosphenes are obtained at lower thresholds for a train of stimuli than for single pulses, which suggests the existence of a spatial and temporal integrating mechanism. The perceptions are much smaller than those predicted from model simulations. A set of equations are derived which show the effect of pulse current, duration, number and frequency on the position, size and, to some extent, luminosity of the resulting phosphenes. (C) 2003 Elsevier Science Ltd. All rights reserved.