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Predicting the present

机译:预测现在

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摘要

Richard Gregory has said that vision allows us to live a little bit in the future — to react to things before they happen. But in one sense, he is quite wrong, There is a delay of about 50 msecbetween the arrival of photons at the retina and the response of higher visual areas. During this time a moving object has continued on its way, so the higher visual areas will be analysing the past history of the object, not its current location. On page 66 of this issue, Nijhawan brightens our outlook by showing that in some cases we can regain at least the present: we can see things not as they were, but as they probably are. This kind of predictive perception, compensating for neural delays, can only happen for objects that are undergoing smooth change (in location, brightness or size, for example), and visual motion is the basis of this particular example.
机译:理查德·格雷戈里(Richard Gregory)曾说过,愿景使我们能够在未来生活一些—在事情发生之前对事情做出反应。但从某种意义上说,他是完全错误的,在光子到达视网膜与更高视域的响应之间存在大约50毫秒的延迟。在这段时间内,移动的物体一直在前进,因此较高的视觉区域将分析该物体的过去历史,而不是其当前位置。在本期杂志的第66页中,Nijhawan通过显示在某些情况下我们至少可以重获现在的眼光,使我们的视野更加光明:我们所看到的不是真实的事物,而是真实的事物。补偿神经延迟的这种预测性感知只能发生在经历平滑变化(例如,位置,亮度或大小)的对象上,而视觉运动是此特定示例的基础。

著录项

  • 来源
    《Nature》 |1997年第6620期|p.1921|共2页
  • 作者

    Patrick Cavanagh;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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