许多人可能听说过视皮层,它位于大脑后部,是神经科学家重点关注的区域。
The visual cortex supports our conscious vision, processing colour and fine detail to help produce the rich impression of the world we enjoy.
视觉皮质通过加工颜色和细节来帮助我们产生对这个世界的印象,从而使我们能够视物。
But other parts of our brain are also processing different pieces of information, and these can be working away even when we don't – or can't – consciously perceive something.
然而大脑的其他区域也在处理着不同的片段信息,而且这种处理甚至能在我们没有意识到的情况下进行。
The survivors of neural injury can cast some light on these mechanisms. When an accident damages the visual cortex, your vision is affected. If you lose all of your visual cortex you will lose all conscious vision, becoming what neurologists call 'cortically blind'.
神经受损的幸存者能阐明这些机体原理。当一起事故损害了你的视觉皮质,你的视力就会受影响。如果你失去了所有的视觉皮质,那么你就会失明,成为神经科学家所说的“皮质盲”。
But, unlike if you lose your eyes, cortically blind is only mostly blind – the non-cortical visual areas can still operate.
但是,这跟你失去眼睛不一样,皮质盲会导致跟皮质有关的视力受损,非皮质的视觉不会受影响。
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