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Why doesn't it go dark when you blink?

People blink on average every five seconds, but despite no light falling on our retinas we still see a stable picture of the world.
Neuroscientists have now identified an area of the brain that plays a crucial role in perceptual memory as the reason why blinking does not disrupt our view.
Experts from the German Primate Centre and the University Medical Centre Gottingen made the discovery while studying epilepsy patients.Alongside colleagues from the US, they noted how people see the world as a stable, unified whole despite blinking.The concluded it must be possible for the brain to retain visual information for a short period of time and use it to create a conclusive image without interruptions.Dr Caspar Schwiedrzik's team of neuroscientists investigated the medial prefrontal cortex, a part of the brain crucial for short-term memory and decision making
Why doesn't it go dark when you blink?

Image:
The medial prefrontal cortex is highlighted in green. Pic: Caspar M. Schwiedrzik
Scientists at New York University examined how it worked in patients with epilepsy.
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