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Georgetown University neuroscientists say they have identified how people can have a "crash in visual processing" -- a bottleneck of feedforward and feedback signals that can cause us not to be consciously aware of stimuli that our brain recognized.
In the Journal of Vision, investigators describe what can occur when the brain is asked to process more information than it can handle. The phenomenon, which they dub a "crash in visual processing," happens when the neurons busy processing one image are tasked with processing another too quickly, and then either one or both images do not reach conscious awareness.


https://www.sciencedaily.com/releases/2019/10/191023121839.htm

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